I have never seen it done in your application, but I bet this would work. Maybe a marine masserator (sp?) pump installed in line with your floor drain would work. These are relatively small units, run on 12VDC, and can pump solids and liquids several feet. They normally are not self actuated unless attached to a holding tank with a sensor, but you could install a switch to run the pump while shower is in use. This may not be the best idea, but I don't know of any units specifically designed to do what you are asking, without a holding tank.
The answer: Swanstone
How I found it: I got lucky. I just grabbed it and started taking it to local big-box places (I assumed it was a big-box as the materials in this house aren't necessarily 'high end').
I stopped at Lowes and the initial guy in the kitchen section had no clue, but I was fortunate that a curious co-worker popped his head over the counter, thought for a minute, then declared it 'Bermuda Sand' from 'Swanstone'. We found the swatches and, sure enough, he was right-on. So kudos tot he very helpful Lowes employee.
Apparently, these type of shower systems are just large panels of solid surface material that is glued up on the wall. They idea is that the panels abut, then caulked. The corner cove is more of an 'extra' piece that can be used if desired. The underlayment SHOULD be your standard tile surface...water proof cement board that is then sealed with some sort of water sealant. However, I don't know that in this case, so this particular piece seems to be a rather critical for my shower. So, glad we were able to find it.
The challenge for future people reading this is that I guess the solid surface companies are many, and the patterns all tend to be unique to each company, so it is a bit of a needle-in-a-haystack hunt trying to find these.
For contractors, I'd like to suggest leaving a note on the inside of a bath or kitchen vanity with the manufacturer's info. That'd be handy. ;)
Best Answer
if its latex paint, it will come off with a paint remover like goo be gone or goof off, if its oil paint, you can use brake fluid. either approach will mean letting the liquid sit on the paint for a few hours or overnight.
however, as both will not damage enameled steel tubs, either can damage acrylic, fiberglass or epoxied tubs, but it depends on the model and what/how its made. i would probably do a test on a single tub in a single unit to make sure it won't destroy the underlying finish.
when all done, clean the area with a good degreaser and then some plain white vinegar (to neutralize the alkalinity of the degreaser)
hope that helps