Aluminum hull discoloration?

[MThook]

The pontoon has started discoloring. It's been in several lakes over the last few years, never in salt water.
Any ideas what is causing it? A cure or fix? I got the toon used and they had shined the hulls up to look almost new.

[STUMP HUNTER]

The aluminum just does it! You can buy aluminum cleaner in a gallon jug, you mix in a yard sprayer with water. It will clean it and make it look new. Just start cleaning from the top and work down.

[MThook]

Stump who carries it? Do you have a name brand?
Thanks for the info

[steve48]

Scooper, You can get aluminum brightener at most any Large trailer places, Great Dane, Wabash, about anyone that sells them that has a parts counter. Be careful with it, and mix with clean water ( no soap) I always mixed it up in a small pump up spray tank. Before spraying pontoons, Rinse them good, spray them from bottom up and don't let them dry until you get all of pontoon covered. May have to do back half then front. They will streak if they dry before finishing them with acid. Leave it on a few minutes. and toons will start turning white. Rinse off, let dry, and if not satisfied you can do it again, rather than leaving it on too long. It cleans out all the poors in aluminum, so may as well get some polish at a truck stop. the green liquid works well with lots of rubbing to seal toons off. let dry good before rubbing off. If polish doesn't come off good sprinkle a little cooking flour on rag to absorb or dry polish better. Main thing is to not let brightener dry on tank, and going over them twice is better than too much at one time. Good luck

[MThook]

Steve, That sounds like a plan. The boat sits on carpeted bunks so I' guessing I should lift the toon, cover the bunks, do the cleaning, rinse then drop it back down on the bunks. I worry about the carpet soaking into the carpet and eating holes in the aluminum, or am I worrying too much?
Thanks for the info

[STUMP HUNTER]

This is the one I used.

Snee Chemical Aluminum Cleaner Brightener Pontoon Boats Tool Boxes Jesco Sales | eBay

[MThook]

Thanks Stump!
This site never fails to help when help is needed.
Grady

[RichWentFishing504]

Polish it up and then wax it. Get rid of carpet on bunks and go with plastic sliders.

[MThook]

Rich, The plastic bunk covers are in the plan, with a 22' toon you have to buy a bunch of the pieces to get r done. It seems they only come in 5' sections, easy to ship I guess

[gabowman]

NAPA sells a product called 'Jupiter'. It's a liquid that comes in a gallon jug. Might have went up a dollar or two but the last I bought cost $3 a jug. Spray it on and wash it off. Alum looks new.