Well, the only problem I see, at first, if that, even if you can get the stain off, you'll probably see 'clean spots' THROUGHOUT the area you cleaned. So, in a sense, when you're finished, you'll see 'white spots' vs. 'dark spots'. See what I mean?
If you want to avoid this, what you need to do is clean the ENTIRE 'section' of the house with Vinyl Siding Cleaner whereever the stain(s) are located. This way, when you actually clean the stains, you won't see any 'white spots'. Buy yourself some long-sleeved gloves and one of those nylon-bristled hand brushes that MaMa use to use on the kitchen floor (when she scrubbed it clean.) The Cleaner costs about $5 a gallon.
Start cleaning the sections from the BOTTOM, up; NOT the top, down. If you do the latter, you'll DEFINITELY get 'clean streaks' in the uncleaned areas below where you're cleaning. So do this from the bottom, up. Rinse as you go the just-cleaned areas as well as the areas you cleaned previous to them. Watch for splashing the Cleaner on UNCLEANED AREAS. Again, you'll get spots and streaks if you're not careful.
WHen the vinyl is COMPLETELY dry, get a cotton swab (to experiment), and soak it w/Skin So Soft (SSS). Yes, that's right. Any woman knows what it is if you don't. Experiment on the more inconspicious spots. If you like the results, go for it! Then, re-clean the previously spotted areas with the Cleaner Solution again to remove the SSS.
If SSS doesn't work, try a dab of Paint Thinner. This is more 'toxic' but will work. I like the SSS because it's less toxic. My best to ya and hope this helps.
Jay J -Moderator
Any solvent or paint remover should work. I am betting that the 'residue' is IN BETWEEN the 'grooves' of the vinyl siding.
Get yourself a nylon-bristled toothbrush and dip it in some paint remover. Gently rub it into the grooves in a PARALLEL direction to the grooves. Wipe quickly soas to avoid streaking and 'running'. (You might want to hold a clean rag under the area you're trying to clean to help you here.)
Other than that, it's possible that the siding, itself, absorbed the stain. In this event, you MAY want to CONSIDER a light sanding of the area in question. Then, you may have to paint / touch-up the areas in question.
When I did my siding, I bought some extra siding material. If you have some extra, consider using it. Replacing vinyl siding is easy. (THere are instructions ALL over the WEB.) Consider 'switching' pieces of vinyl siding from more 'inconspicious' places on the house (where the pieces are in good shape) with the ones that are stained. Of course, you'll need the pieces to be the same size!
If you need more info, come back. In the meantime, if the toothbrush idea works, let me/us know. My best to ya and hope this helps.
Jay J -Moderator
PS: As you know, paint thinner can remove deck stain. Be sure you brush your toothbrush PARALLEL to the 'grooves' in the vinyl. If this doesn't work, the stain got absorbed into the vinyl. At this point, you paint or switch-out the piece of damaged vinyl ...
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