Hi Martin!
Are your topsides painted or gelcoat? If it's gelcoat, Aurora Boat Scrub workswell at deoxidizing. It contains Hypexine which helps to leach stains out and also leaches color to the surface. Unless the gelcoat is shot, fiberglass specks showing through, this should do the job without cutting the surface any more than it already is. A lot of dealers use this to detail used boats prior to reselling. I've had really good results just using it full strength with a dry cloth and working in small areas, 2 sq. ft, and polishing it until it is shiny and new looking again. I then apply a couple of coats of Aurora Boat Shine to seal, protect and shine the surface. It usually lasts a full season. My boat is a 1991. Boat Scrub is one of the biggest selling fiberglass cleaners in Canada. It's also excellent for cleaning Non Skid Decks, fenders, rub rails, rusty stantions and getting hard to remove stains and scuffs out, even rust stains.If your surface is paint, it's probably Imron or Awlgrip. A quick fix for faded paint is Aurora Kwik Shine. Another popular product with dealers for detailing used boats. Another feature of Kwik Shine is that it can be sprayed directly on salt spots. It disolves the salt and converts into a cleaner. Kwik Shine leaves a polymeric, UV protected shiny coating and it can be used on all smooth surfaces. If you decide to try these products, check out Aurora Sure Step for your decks. It's the worlds first (and only) polish for non skid decks. You will need the Boat Scrub to prep the decks first. Sure Step is pressure sensitive, meaning that it is slippery to dirt and grime but your weight will create traction. When the decks are wet, the grip increases. It is shiny, contains UV inhibitors and re-seals the pores in the gel coat deck, helping to retard wear.The decks become super easy to keep clean. Sneaker prints just hose off. No more scrubbing.If you need more information, check out the Aurora Marine web site at"http://auroramarine.comHope this info helps.
Richard.
NOTICE: Richard Kittar is employed by Aurora Marine Industries. This information is given based on over 20 years of personal experience with boat maintenance. This message is not intended as a commercial promotion. Please disregard it if it offends.