Which gelcoat cleaners are best at combating waterline yellowing on boat hulls? Ben Meakins dons his rubber gloves and puts 10 products to the test
Y10 Stain Removing Gel
PRICE: £10.95/340g (£32.20/kg)
Y10, which comes in a small tub, contains oxalic acid in a gel form. It is brushed on over the stain, left on for 10 minutes and then washed off. It was easy to apply, and the moderately thick blue gel could be spread quite thinly, helping the pot to go further. Once rinsed off it was the most consistent performer on test, with all staining on the panel removed to an even white in the 10 minutes it had been left on.