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Author Topic:   Bottom discoloration
RJM posted 09-14-2003 11:19 PM ET (US)   Profile for RJM   Send Email to RJM  
What a neat website! I have spent three or four hours looking at the pictures and reading the forum and have truly enjoyed every monment.
I recently purchased a very clean 1996 Outrage II with a 150 Mercury. The previous owner kept the boat at a fresh water slip and thus; the bottom is a little off color. Does anyone out there have a good idea on how to restore the bottom? I would also be interested to have any other input on how people like this boat and any problems they have solved before I reinvent the wheel again.
lhg posted 09-15-2003 12:03 PM ET (US)     Profile for lhg    
The yellowed hull bottom can be usually cleaned with Starbrite's Instant Hull Cleaner, which cleans by a neutralizing action. Buy a gallon size, and pour into spray bottle. If the yellow has been on the hull for many months, and this will not cut it, you can use the Sudbury HD Fiberglass Cleaner, in powder form, but without abrasives.
Give both a few minutes to do their work.

In both of these, the active ingredient is oxalic acid, and will not damage the gelcoat. If neither of these are completely effective, try Marykates Hull cleaner, which is phosphoric acid, and IS more likely to damage the gelcoat. Nasty stuff to work with, but should do the job if the others fail. Work quickly and wash it off fast. Keep a hose available to wash off trailer or it will trash your galvanizing/aluminum.

If needed, you can finish up polishing the bottom with Meguiars #44 color restorer, followed by 3M Finesse-it II for highest gloss.

Bigshot posted 09-15-2003 01:18 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
marykate's On/Off hull cleaner.....nasty stuff but works like a gem.
RJM posted 09-16-2003 12:22 AM ET (US)     Profile for RJM  Send Email to RJM     
Thanks for the info....I will give your tips a try..
prm1177 posted 09-16-2003 09:24 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Don't forget to rinse the hull and put a couple of coats of wax on it when your done.
Swellmonster posted 09-25-2003 09:09 AM ET (US)     Profile for Swellmonster  Send Email to Swellmonster     
How do gems work? ;)

I agree with Biggie with the MK O&O. I put it in a spray bottle, dilute it with about 75% water, stonger if not enough. Wet the trailer with water, then spray the bad coloring. In a few minutes, the color should go away. Rinse well and wax well.

dreid posted 09-25-2003 11:31 AM ET (US)     Profile for dreid  Send Email to dreid     
Barkeeper's Friend is an oxalic acid based abrasive cleansing powder you'll find at the grocery store. It will scratch your gelcoat if you press hard when scrubbing, but it will cut through the discoloration without major scratches if gently applied. If you are headed toward using Finnesse It II as a final compound before waxing, the BK Friend is a great first pass.
rhandley posted 07-12-2005 07:39 AM ET (US)     Profile for rhandley  Send Email to rhandley     
How do these products work on moldy, mildewed and stained vinyl trim?
Whalerider posted 07-12-2005 11:06 AM ET (US)     Profile for Whalerider  Send Email to Whalerider     
Where I live, bottom discoloration is a part of life. The waters are very dark and full of organics that will stain your hull in a few hours. I have used the Starbrites products with good results. Waxed with a couple of recommended products. But even though I can get it back to almost the original’s just a few outings before back to square one even though I wash it carefully after each trip. I have decided to live with the slight discoloration and do my best to clean and wax it 2 or 3 times a year. That’s life down here in South Carolina, might be the same where you are. If you cant live with the staining...bottom paint is the only solution I know of.


prm1177 posted 07-12-2005 11:52 AM ET (US)     Profile for prm1177  Send Email to prm1177     

Discolored vinyl is a problem as much of the time the mildew is stained through to the backing. Mild bleach solutions have been known to help, or else repeated applications with an Oxyclean type oxygen bleach can also work. Starbrite vinyl cleaner is also quite good at removing crud buildup (layers of sunscreen) from vinyl seats.

rhandley posted 07-12-2005 12:17 PM ET (US)     Profile for rhandley  Send Email to rhandley     
I have tried everything short of denture cleaner! Products or solutions of miriatic acid may work, but I'm concerned that the solution will etch, or worse, eat the vinyl. I'm wondering if there is someone that has used MaryKates, or similar products on Vinyl stripping (trim). Mildew and stains were caused by storage in the Florida panhadle 8 months during very wet, and humid consitions.
lurkynot posted 07-12-2005 09:58 PM ET (US)     Profile for lurkynot  Send Email to lurkynot     
rhandley, I bought a new Whaler 3 years ago and like most ran out and ordered a custom made cover for my boat. Much to my dismay the color of the material ran and stained most if not all of the vinyl on the surfaces touching the cover. I immediatley called the manufacturer whom wa svery helpful and apoligetic rushing me another from a different batch of non-running material. They sent me a small can of Wipe Away w/citristrip. Needless to say I was very skeptical, however much to my suprise this stuff cleaned all of the dye that ran and then some - left over grime from the previous drydock through winter. This stuff truley works. As with all cleaners I would strongly recommend using it sparingly in an area with limited exposure. On my cushions it has'nt left a scratch or anything 100% satisfied. Don't know if your vinyl is from the same vendor so if you use it be careful as previously mentioned. Good luck

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