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Location: Merryland
09-04-2019, 05:24 PM
(This post was last modified: 09-04-2019, 05:26 PM by Snipe Hunter.)
I wouldn't use a power sander on latex. I'm going through this now on our remodel. The previous owner left runs all over the place. So, to get out the runs, I'm using a sharp chisel and a low angle block plane with the mouth adjusted wide open. It isn't perfect but is cuts the run off. then I scuff the area with 120 or 180 grit (whatever is handy). This is so the new joint compound adheres. Then I skim joint compound over the area with a good straight mud-knife and sand smooth with 180g. A sanding block is a must. Then prime it and paint. I want this old abused house to look new. I did it this way upstairs and it looks new. I've done about a quarter of the 1st floor. Yours doesn't sound as bad, I'm skim coating and sanding entire walls. Something else you might try is adding a little water to your joint compound to thin it to make skimming easier. You don't want to build up joint compound or you spend a long time sanding it flat. You should almost be able to see through it.
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Scraping with a very sharp scraper or even a utility blade will shave off material.