Do not use the quick reply.  Have the pictures you want to upload on your desktop,  Click on Post Reply, write your description, hit return to get the curser below the words you just wrote by a space or two.  Click choose file, click on the picture you want, then click Upload on the box that shows up.  that box will go away, now click Upload on the Image Properties box that was there before.  the picture will show up to the right in the Preview.  Click ok.  Then if your post is good, click post reply.  Sounds like a lot but once you do it twice it's quick and fairly simple.  

If you make a mistake, slightly change the picture name before trying again.  you can't use the same name twice.  Might be some way to delete the old names in the File Name box but I never found it.

Cracks in the gel coat are a giant pain.  I've fixed small ones by grinding out with a Dremel and filling with gel coat, some came back, some didn't.  I would not want to do a lot that way, would take forever and might not work.  Someone on here will have a better idea, probably involving an expensive paint or a regelcoat. 

The ones around the exhaust were started by the screws.  You need to oversize the part of the screw hole that goes through the gelcoat or you get stress cracks.  Learned that the hard way.  Surprised that they grew that long however.

I had a Whaler Rage 15 with a few minor stress cracks.  I ground them out with a dremel tool, filled them with a matching gelcoat and wet sanded smooth.  Most stayed gone but a few came back.  

The Rage 15 had large decals on the sides that were faded and damaged, figured the boat would look better with them gone.  Had them removed and under the decals were stress cracks similar, though tighter and not so many, to what you see on the side of your boat.  figured the decals caused them somehow, I just waxed over them and moved on.

You can usually get into the side of the main stringers in the engine compartment and in the removable panel over the shaft and exhaust hoses.  Drill a couple of holes with a 1" or 1 1/2" hole saw through the fiberglass in the side of the stringer and see what the stringers look like in a couple of places.  Patching those holes is pretty easy with some glass and epoxy afterwards.

I guess you could say that CC's gelcoat wasn't the best. Some people say it was too thick, others will tell you that it absorbs a small amount of water and if left in the water for long periods of time you get the stress cracks below the waterline because of this.

Some CC boats are more susceptible than others for whatever reason. Gelcoat improved over the years but in the 70's and before, stress cracks were pretty common.

Just tell yourself that they're like the wrinkles on your face as you get older, otherwise you spend a lot of time and money grinding all the gelcoat off and redoing it.