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I have to paint an unfinished Doug fir 10-lite French door that has mildew on it. Have tried sanding off the mildew stains but it’s slow going and I’m afraid of over-sanding. Is there a product like a wood bleach that will remove the stains and perhaps even kill off the spores so they won’t come through the new primer & latex paint? Or should I ignore them, add mildew killer to my paint and just paint over them? I don’t mind the work, I just want to do a good job. Thanks!
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Replies
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Your paint store will have a product for killing mildew. It's basically chlorine bleach in a spray bottle, so you could use that, too.
Definitely put mildew additive in your paint to prevent the problem from cropping up again.
*Regular household bleach (such as Clorox) will kill mildew. Dilute it 1:3 with water, sponge it on mildewed areas, let it sit for 5-10 minutes, then rinse it off with plain water, twice.Wear good rubber gloves and eye protection--even at diluted strengths, bleach will cause chemical burns on your skin that will leave you in pain for days.Let the wood dry thoroughly before you paint it, and it won't hurt to use a mildewcide mixed into the paint.
*I really appreciate your straightforward advice. I sponged the door with 3:1 water/household bleach, scrubbing the bad spots with a cookware scrub sponge so as not to scratch the glazing and rinsed with lots of plain water. I cringed the whole time about getting so much water on it but it dried OK and looks just fine. Thanks!
*Good to hear that you were successful. It wouldn't hurt to let the wood dry out for another couple of days before you apply a finish.
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