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



Meguiars Marine Heavy Duty Oxidation Remover

PRICE: £12.60/473ml (£26.64/lt)
Contact: www.meguiars.co.uk
This product differs in that it requires polishing to remove ‘moderate oxidation, stains and scratches’. It can be applied by machine or by hand: we opted for the latter approach, rubbing it into the surface with a cloth, and immediately wiping dry with a dry cloth. After three repetitions it was clear that this would require more elbow grease than the acid-based products, but it did leave behind a nice finish to the gelcoat – although quite a lot of brown staining was still present. Using with a cutting pad on a machine polisher would reduce the effort required, but it still wasn’t as easy to work with as the others.


  1. 1. Introduction
  2. 2. International Stain Remover
  3. 3. Silky Marine Bright
  4. 4. Starbrite Hull Cleaner
  5. 5. Farecla Professional Rapid Stain Remover
  6. 6. Y10 Stain Removing Gel
  7. 7. Meguiars Marine Heavy Duty Oxidation Remover
  8. 8. Grunt! Boat Cleaner
  9. 9. Chine Shine
  10. 10. Boat Buddy Marine Surface Wash
  11. 11. Hempel Cleaning Gel
  12. 12. PBO Verdict
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