I would love to add to this topic as I am working on this now and have had horrible results with tons of work. I started by removing my tub, back splash and sink surround. They all received new fiberglass backing for any cracks and bondo up front to smooth the surface. Each was sanding with 120 grit and then 220 grit to perfection.
Then the hell began...
I decided to try POR-15 Whitecote
because everyone around here raves of the regular POR-15 and it's durability. I also read another thread from and Argosy owner who used POR-15 Whitecote and was very happy with the results.
We applied the Whitecote and immediately noticed that this was going to be bad, but we thought maybe it will self level over time. It did to some degree but what we were left with after the 72 hour curing time was much less than desirable. There was serious amounts of orange peel and pinholing throughout the surface as well as dripping down any vertical face. I thought that my GF just applied too heavy a coat on the tub so I applied the next round. It didn't matter, Even light coats were subject to some dripping. Anyway, I highly recommend AGAINST this product unless you want to spend the next 2 week sanding...
Now that I have the pieces sanded back down to the plastic, I have repainted with XIM Plastic Primer
. I used spray cans. I worked great. Bonds great to the bondo and plastic surface. I applied two coats and sanded smooth. My next step is going to be the Tough As Tile from Homax.
I will update this thread after and let you know my results. I am crossing my fingers because I don't think I can handle any more serious sanding at this point.