just bought white grp boat which hasnt been washed for a few years can anyone recomend a spray on rinse of cleaner and a good coulour restorer to polish the hull it is looking very dirty and feded
Anything with oxalic acid in the formula - usually spray on - leave for ten minutes and wipe off with rinse. Look out for "Non-Slip deck Cleaner" by Starbrite, works well on textured decks if you follow the instructions.
If you want to do a proper job, and get the GRP smooth and clean so that the dirt doesn't "grip" so much, have a word with AdrianB at http://www.cleanandshiny.co.uk/.
He's on the Forum, and is very helpful with advice and the right products.