Originally Posted by minaret
There are some specialized products made for marine applications which I have used. To get the desired effect without darkening or hazing you need to use such a specialized product, as regular poly resin has no UV inhibitors and will do both if not coated with something that does have inhibitors. The viscosity is all wrong and it tends to end up with very small bubbles in it. Regular poly resin is also not designed to be poured in the desired thickness and can exotherm too hot, causing yet more darkening and potential crazing down the road. It also is not very clear and is fairly dark by nature even when first applied. After playing around with various products, I much prefer Clear Cast resin from Fiberlay finished with Duratec after the pour. It wet sands and polishes beautifully and holds up to UV quite well and is crystal clear. It is a bit of a process though. Great for tabletops as any scratches can be wet sanded and buffed out and it looks amazing.
Thanks to all , we are making some headway.
I think you are on a similar track. However, I'm not looking to pour the product. This is for Extremely
expensive tables and concert pianos.
It definitely does not not darken in an interior environment
It's Sprayed or brushed to 7 coats.
Brankin.... your comment on repair-ability was a great point and got me looking at piano repair where I finally made some headway. Lot's of good info on Polyester finishes. Yes, they do need special techniques to repair. Without the knowledge it 's impossible.
Cheechako hit it on the head
. Plan "B" I can use Nitrocellulose lacquer get very close to the same look. It will avoid the UV protection that can not help the coating's clarity . EPA hates it since I recall
it has more solvent than resin.
I think an email
to Epifanes is in order. They mention that there PP Varnish ($$$) is a good primer for Polyesters. They must know of one used in the marine industry. Next challenge will be to get the Rubbed effect finish to stick to the Polyester. Epifanes should know that as well.
Thanks again to all.