Left my 1966 at trans shop for C4 rebuild ,they left outside and sprinklers came on with 98 Deg. weather here in So. Cal. When I picked up it had been washed, so I didnot notice(translucent) the outline of spots until under my garage lights. Color is Burgandy, I worked in watrer treatment and recycled water during my carrer so i know it's hard water. Any susgestion would be appreciated.