Tried the oxalic acid on my "White" boat, hells teeth, the bits I missed on first pass looked like the walls of a Pubs tap room, went round again, and just hosed off, the effect is unbelivable, no scrubing or rubbing. thks Duncan
ps wish this had a spell checker
Have been reading up on web how to remove water mark yellowing, and lots of people say use oxalic acid mixed with wall paper paste to make a gel, but were do you get it from, have tried all local pharmacys which dont stock it, or chemical retailers which will not sell it to me, or on web but...