Building a Sea Chest

[Blue_Heron]

Originally Posted by mbmcdermott18

the box will be about 21" wide flange-flange with the bottom of the box being aprox 17 3/4" the box will be aprox 10" wide flange-flange.

What is the difference between pva and wax? I have read of people using both and I have read of people using one or the other. Is one better than the other?

strick is right. If your box isn't any bigger than that, you don't need to core it. strick has more experience than me on gelcoat application and layup. I've never been able to brush gelcoat without streaks showing up in the finished part, so I spray it. I would go with his layup recommendation too.

PVA is Polyvinyl Alcohol. It's basically a water soluble plastic. You spray it on your mold and it forms a film that looks like green saran wrap. Here's a link to a better description:

http://www.bottompaintstore.com/part...t-p-10321.html

They carry it at US Composites.

Dave