Re: My Jupiter rebuild
The Rusto should be OK sitting in the water for a few days at a time with no problem. Here's a Rusto story for ya:
I added short bolt-on axles to my boat lift, the kind you can slip 18" plastic wheels on to put the lift in and out of the water. The axles are just short 1-foot long pieces of galvanized pipe welded on a steel plate that you bolt to the lift frame. Before installing them, I primed them, then painted them with some left over Rustoleum "Stops Rust" that I had. The lift went in the water in May and came out in September, being submerged the whole time (fresh water). When I checked the axles, there was no evidence at all that they had spent months underwater, no bubbling, wrinkling or anything. And this didn't have any hardener in it either.
So even though I don't think I'd continuously leave a boat in the water painted with a "non-immersible" paint, this says a lot for how it will stand up, I think.
Enjoy the warm weather you've got coming and go for it! I'm looking forward to seeing it painted.