Small amount of fairy liquid ONLY
in warm water to wash and get rid of the dirt. Rinse with water.
Toluene based (or neat Toluene if yuo can find it) to cleane any dirty spots any where tubes, fiber glass even on your car paint (although I will not use it there) that other so called 'cleaners' and methods will NEVER
clean. You must be IN A VERY WELL VENTILATED PLACE WHEN YOU DO THAT Toluene staff!
(Now I'm on the subject I just remebered that Mr JK banned me for suggesting Toluene ALTHOUGH OTHERS HAVE SUGGESTED IT BEFORE ME TOO!!
have a look at his link!!!!! What a ....... whatever
is his forum any way so ............... )
And finally to protect the tubes from UV rays
(this was the original question I beleive) use any 50, 60, 70, 80 whatever high factor sun tan lotion you find (I use Nivea is cheap and 1/4 of a bottle does all of my 8.5/9 mtr boat). It stays on for about 2/3 weeks at a time and I beleve that it works (may it doesn't but my boat's tubes look brand new and they sit under 40C in the summer in Greece).
Now if you want the boat to shine too after you wash it well, use sun lotion factor 50,60,70,80 whatever and then after you finish this job, use Armorall (the shine staff) aftewards. Guranteed results