I have two questions. I bought a Trillium
1300 last week and can't figure out what the rubber ball on the road side is. - It's in a fitting like the water inlet and drain, but the bubble doesn't lift or move. It does squish inward like a tennis ball. I'll put a photo here.
My second question is about painting
the interior of our 4500. I have been reading everything that I can find on this site about painting
over the gelcoat of the cabinetry but the posts seem quite old. I may be doing something wrong when I search. In some of the older posts people mention that no matter the prep, the paint
will scratch or chip. Has anyone had better luck with some of the newer paint
technology? My plan is to sand with 400 grit, prime and paint
but don't want to do it if the finish is going to scuff.