Rebuilding engine box, epoxy and polyester resin question

[Coastal]

Hello, I am rebuilding my engine box. In constructing it, I joined all pieces of wood using west system epoxy. In the process, I wiped every epoxy seam with a cloth to remove excess epoxy drippage after fastening the components.

My plan now is to glass over the whole box, using polyester resin and cloth. My concern is that although I wiped all seams in an attempt to remove epoxy on the surface of the wood, there are still trace amount of epoxy exposed. I'm worried that if I fiberglass over this with polyester resin It will not adhere, even though the exposed epoxy seems fairly minimal.

What should I do? Abandon the polyester fiberglass idea? or are the amounts of epoxy minimal enough that It wont be a problem? included are pictures.

Thanks for your help.

 

[El Mar]

What should I do? Abandon the polyester fiberglass idea?

Basically yes.

You went this far with epoxy, why change??

Rule is Epoxy over Poly, not Poly over Epoxy.

But rules can be broken if you are brave. At this point, I wouldn't to save a few bucks.

What are you planning for finish?

 

[Coastal]

Just flexdel aquagard commercial enamel paint. It is cheap at hamilton marine but I have had good luck with it.

 

[Coastal]

In the future If I wanted to use poly resin, what would I use instead of Epoxy to join/seal the joints?

 

[F/V First Team]

Glue and biscuits. You could use a barrier agent on the epoxy then put your original plan into effect.

 

[Coastal]

What is a good barrier agent?

 

[F/V First Team]

A linear polyurethane paint would probably suffice for your project