GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
Instead of carpet, I'm wondering if I could lay rubber flooring down over epoxied plywood? It's nonslip, tough, and won't be damaged by water and easy to remove and clean. Plus I wouldn't have to mess with any more adhesives.
Won't being covered with rubber keep it out of sunlight? I want to get a mat and cut to shape... no more messing with painting. I found some that is only 4mm in thickness, which should be enough to make a soft flooring and not be overly heavy.