Thanks Ron. Luckily the boat has Opti-Coat v2 on it.
I was using Vinegar mixed 50/50 with water, then doing a ONRWW wash after every use. Was a PIA.
Where we waterski/board the water is hard and leaves a spot immediately. So at the ramp after I pull it out, I wipe off any excess water with MF, then spray down with Speedgloss and go over it again with a clean MF....comes out perfect. Not spots, nice gloss.
Regardless I'm ordering MDR because i'll try just about anything Optimum puts out.
I'll report back my findings when I get her out of storage !