Hiya I’m soon to be painting and resurfacing my potable water tank on my narrowboat. I’m planning to use vactan first and then over coat it with a product of yours.. can you advise on what would be best please for potable water systems? And do I need to rinse the paint off once cured and before filling thr water tank? Il be doing it in September but just as a matter of course can you confirm the minimum during temperatures for it? Thanks