Reply by bondogaposis

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Posted on Sanding between coats of Minwax Polycrylic

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5573 posts in 2918 days

#1 posted 07-03-2018 09:16 PM

It sounds like you are sanding right through the finish. There is no point in multiple coats if you are going to sand it off. When sanding between coats don’t use the sanding block and use a very light touch. I use 400 grit foam backed sandpaper for that task. Another option is the non woven scotch brite pads. Regular sandpaper will work too, but just use it in your hand so you can feel what is happening and don’t bear down on it. To answer your second question, the best solution to apply finish to the insides of a project prior to assembly. Inside corners are a bugger as you are finding out. Of course it is too late for that now. I recommend that you mask off the vertical surfaces and apply finish to the horizontal surfaces. When that cures rotate it 90° and repeat.

-- Bondo Gaposis

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