Polishing Hull: Steps and Materials?? |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Along similar lines, the transom below the waterline on the Martini is really yellow (white hull), is there anything you guy's would suggest to perhaps clean it or brighten it before doing any more sanding?? Sanding done so far has not taken any of that yellowing out??
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Mojo
Grand Poobah Joined: December-06-2006 Location: United States Status: Offline Points: 3106 |
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It should have CG. Nothing should brighten up the hull better than physically removing layers of oxidation and gel.. What grit did you try? Might have to more coarse, or continue to wet sand. You should see a difference... |
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05' SV211 TE
73' Martinique had:96' SNOB had:76' Nautique had 77 Tique |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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Yellowing as in water stains? Hull cleaner is the way to go- sanding would probably work, but 1000x harder for the same results. Ive seen plenty of oxidation at the waterline before, but its always chalky, never "yellow". Wetsanding does a good job on oxidation, if thats what youre seeing though.
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Believe it's just staining, this would be the area below the swim deck. Used some toilet bowl cleaner on all the yellow area's. Made very little difference in this area however. Anything else that might work, like bleach or something along those lines that is safe for the Gel??
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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If its just a stain, on/off will take it off. Havent seen anything that it cant touch yet. I was not impressed with the toilet bowl / peroxide recipe at all... nowhere near as effective as on/off. Its muriatic acid based though, I believe- its some serious stuff so be very careful getting it on your skin or eyes, and dont let it sit long on any painted surface (like the graphics, trailer, etc).
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rogier
Groupie Joined: September-01-2008 Location: Netherlands Status: Offline Points: 77 |
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Yellowing is pretty normal for a boat in fresh water. If there is no anti-fouling paint on the hull, I use Muriatic acid to clean it. There are specific acid products for hull cleaning, they all do the same. Check for the concentration, this should be as high as possible for a quick result. Spray it on, brush it a bit and spray it off after a while. Make sure you are protected and that you are in a well ventilated area. After drying, I rub one layer of protection & sealer wax on the hull. Sanding is a no-go for a yellow/brownish hull, the colour has penetrated into the gel coat and sanding it off will reduce gel coat that is perfectly fine.
Yes these are the ones to use! |
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davidg
Grand Poobah Joined: January-07-2008 Location: NW Chicagoland Status: Offline Points: 2239 |
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Quinner....Try "The Works" toilet bowl cleaner. I have never seen anything work so well as that. Pretty caustic stuff though. Handle with care. Don't let it get near any metal parts either.
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79TiqueRebuild
Senior Member Joined: January-21-2009 Location: Kansas City, Mo Status: Offline Points: 238 |
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I use the works tub and shower cleaner. The price is right too!
I get it a dollar general. Monty |
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uk1979
Platinum Member Joined: June-13-2007 Location: United Kingdom Status: Offline Points: 1422 |
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Good tip Monty |
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Lets have a go
56 Starflite 77 SN 78 SN 80 BFN |
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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The works dollar store toilet bowl cleaner is exactly what was used, is it possible this stuff could blister the gel??
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uk1979
Platinum Member Joined: June-13-2007 Location: United Kingdom Status: Offline Points: 1422 |
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My guess is Monty thought, a skid mark is a skid mark there all the same............. |
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Lets have a go
56 Starflite 77 SN 78 SN 80 BFN |
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tbeard
Senior Member Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 379 |
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OK I wanna make sure I am clear on what to purchase to de-yellow my hull. I have seen several sugestions. We are starting this cleaning process on Saturday so I need to know what to buy.
1) on/off will take it off. - Is this easy off oven cleaner? 2) muriatic acid based - Is there a specific product this acid is in? 3) the works tub and shower cleaner - The blister comment concerns me! Also will it de-yellow a 25 year old hull. |
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Thanks.......Tom
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uk1979
Platinum Member Joined: June-13-2007 Location: United Kingdom Status: Offline Points: 1422 |
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All Jokes apart .....many bath tubs /shower trays are fibreglass too.....just don’t leave it on long and wash off with plenty of water .........always try a small area not see first.
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Lets have a go
56 Starflite 77 SN 78 SN 80 BFN |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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harddock
Platinum Member Joined: June-04-2008 Location: Toontown, MA Status: Offline Points: 1763 |
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FSR Fiberglas Stain Remover. Sold at marine specialty stores( West etc) it is a gel you put on, let sit and then wash off. It will remove the coffee colored stain at the waterline. Y-10 is a similar product (both are some sort of acid based) but I had better results with FSR. I have been told that Naval Jelly also works.
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Mojo
Grand Poobah Joined: December-06-2006 Location: United States Status: Offline Points: 3106 |
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I've always used straight muriatic acid. Never harms the gel, just have to be really aware using it in well ventalated areas. Can be purchased at any hardware store.. |
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05' SV211 TE
73' Martinique had:96' SNOB had:76' Nautique had 77 Tique |
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Tom, believe easy off oven cleaner will remove paint from gel, would be careful about using that.
1) Marykate on/off - $15qt 2) muriatic acid - $8gal 3) the works tub and shower cleaner - $1qt 4) Davis FSR $13 16oz Is Marykate or Davis worth the extra $$?? Does anyone know for sure if the works or muriatic are safe on the gel? |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
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Been used many times, as said above. |
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Mojo
Grand Poobah Joined: December-06-2006 Location: United States Status: Offline Points: 3106 |
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CQ, the 97' Cobalt we have up in Green Lake has had it's hull splashed with it ever since it was new. Never any issues. Cleans perfectly. Just wax after and done !!! DD |
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05' SV211 TE
73' Martinique had:96' SNOB had:76' Nautique had 77 Tique |
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levinmark
Senior Member Joined: November-11-2010 Location: illinois Status: Offline Points: 375 |
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Hey guys, just curious, what is the procedure with the muratic acid? How do you apply, do you let it sit for a while, scrub? I would like to try this this winter and would like to know the correct steps. Thanks
Mark |
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levin
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MI-nick
Gold Member Joined: January-12-2009 Location: Ypsilanti, MI Status: Offline Points: 810 |
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add starbrite hull cleaner to the list..about the same cost as the on/off. i like to put it in a spray bottle...spray it on, let it sit, hose it off. usually takes me multiple applications to get all the stains off, but no scrubbing. |
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As far as I can tell, I'm not quite sure...
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Mojo
Grand Poobah Joined: December-06-2006 Location: United States Status: Offline Points: 3106 |
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Mark, Probably not a good idea to use the acid unless you have a lot of water to neutralize it. I spray it on, brush it for a few seconds and rinse it off.. You can't use it indoors, as the fumes will burn your nose and throat.. Outside in the driveway, no problem.. I've also poured it straight from the bottle onto a rag, then placed it over a long RV type washing broom and scrubed the hull that way. Use rubber gloves and just make sure you rinse everything that is comes into contact with.. Work from bottom to top to make sure this stuff doesn't drip on you.. Sounds bad, I know, but nothing in my opinion will clean/strip a hull faster and more effective. Just have to use it wisely and it does a great job... Wax after it dries and you're ready to go.. No, it won't get rid of a chalked up, oxidized surface, but lake scum, stains, etc. it does wonders on... Moj' |
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05' SV211 TE
73' Martinique had:96' SNOB had:76' Nautique had 77 Tique |
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levinmark
Senior Member Joined: November-11-2010 Location: illinois Status: Offline Points: 375 |
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Moj', thanks for the info. I guess if I'm going to try it, I'll wait till spring when it warms up to pull the boat out in the drive and the hose going. Right now I got the boat jammed in the back of the garage with platform off, trailer tongue in up position so we have room for both vehicles. Just got her tucked away and dont want to mess with it for a while. Its a 26x26 garage, we can park her escape on one side and I can park my truck on the other with about 5" of clearance for the door
Mark |
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levin
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baitkiller
Platinum Member Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
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For using M acid we usually use a paint roller and cheap plastic paint roller tray. Use an extension handle or broom stick. You can roll sideways from the chines down over the strakes to the bilge line pretty easy. let sit and hose off.
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Jesus was a bare-footer.............
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levinmark
Senior Member Joined: November-11-2010 Location: illinois Status: Offline Points: 375 |
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Another good tip, thanks guys. I'll give it a whirl when things warm back up.
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levin
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