Had a problem in the upstairs bath room. It's a very small room but we ended up removing everything but the tub. Prior to the problem, everything was yellow and not from age! It was meant to be yellow. Anyway, I bought a 2 part Rustoleum kit from ACE hardware. I found a demonstration film on You Tube which made it look easy. I have sanded it, buffed it all out, scrubbed it with bleach, re-cleaned with Soft Scrub and wiped down with paint thinner followed by sanding with 400 grit and finished (finally) with 600 grit Then scrubbed out and wiped dry. Now the painting... The drain needs to be covered and the excess continually. How much can collect on it before a problem develops? How long does it take to 'set'? The directions say to go 2 coats about 2 hours apart. Any tips or experience tips would be greatly appreciated! Thank you.