Siding wont get clean

Old 04-13-04, 10:16 AM
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Siding wont get clean

I rented a 2000 psi power washer from Home depot last weekend and used the chemical they recommended and it didnt do a thing to the siding. It still has this horrible dark stuff everywhere that wont come off. I beleive it is aluminum siding and it really looks dingy. Would more pressure help? Im really confused.
Old 04-13-04, 03:02 PM
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How about mixing some bleach water (1/4 bleach to 3/4 water), spray it on with hand-pumped garden sprayer and let it sit for a while (protect plants). See if that breaks it up, and then hose it off.
Good Luck!
Old 04-13-04, 06:31 PM
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I am wondering if you can post a picture. It sounds like you might have a problem with oxidation and the dark spots you are seeing are actually the unfinished surface of the siding. If this is the case you will find it hard to remedy and might need to paint.

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