Forum Title: Lye/Sodium Hydroxide paint stripping problems
Hi there, I'm stumped and have run out of creative solutions. I'd appreciate any explanations but more than that, remedies! I'm using a lye/water/flour recipe to strip several layers of paint from all the redwood trim in a 1910 house in the S.F. Bay Area. It works great, although there's still a lot of scraping that needs to be done - but less since I've been using a stronger formula. But here's the problem, once it's off, I've neutralized it with vinegar, let it dry, and sanded it: it's incredibly splotchy - in some areas I can pretty easily get back to the virgin redwood (been using 80 grit, btw) but in others I just can't get through the dark sections. I don't know if this is where the lye soaked through deeper or maybe this is original stain. I've thought that the only solution - because the goal was to get to bare wood, not to paint it again - is to apply a light solution of lye to the pinky areas to get it to basically match the darker areas and then apply a light-colored watery milk paint wash. Thanks for reading! MH
Category: Painter Post By: CHARLES S (Charlotte, NC), 07/24/2019

Vinegar is for food! Oxalic acid for wood.

- EDDIE MENDEZ (Palm Coast, FL), 08/16/2019

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