Lost in the Woods

When it comes to WOOD ~ I'm lost my wrenches don't fit and it doesn't weld very well.   HELP !

I'm searching for a suitable wood for interior trim panel backing ~ (Simple?)

Skimming the BOATBUILDING WITH PLYWOOD, by Glen L. Witt CHAPTER 5 - LUMBER didn't do much for cleaning things up. Searching the site has not hit a home run yet either ~ probably just me.

I'm worried about rot / splitting / weight / flex / swell - expansion / compatible with trim staples.   

I have CPES and plan to coat 100% 2x before covering (I realize staples will cause holes in the epoxy coat).

I've looked at generic 1/4 plywood but some of my narrow trim pieces are longer then 8' and I can't weld 1/4" plywood.


                   Thanks,
                      Michael

Thanks Pete,

    I'll go search for coaming pad backing.

Are the easy to find big box store long boards a no no?

Butt block like this one at glen-l   





Scarf joints look cool but might be over kill unless I can find a trim guy who needs auto work.

Thanks ~ Thought I was having trouble with my search.

I will look to make it work with the ply and butt blocking.

Dave,
Skip over the idea of using "foundation" grade ply if you plan on any coatings. It's been treated to a higher level and will not like the CPES and resin.