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Tried a water-based poly over oil-based stain and got a weird cloudy mess
I did a maple table top last week with oil stain left to dry 72 hours then brushed on water-based poly and it turned milky in spots. Everyone online says water-based is fine over oil as long as its dry but I guess not for me. Anybody have a trick to keep this from happening or do I just gotta stick with oil poly?
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harper_murphy4mo ago
Yeah the "as long as its dry" part is where people get hung up. Oil based stain takes way longer to fully cure than people think, 72 hours is not enough especially if you put it on thick or its humid. The water based poly is basically trying to stick to a surface that still has some solvent coming out and it rejects it, thats the cloudiness. This is just like everything else in life, people want to rush things and skip the waiting part. Same reason why my buddy tried to seal his deck after two days of sun and it peeled six months later. You gotta let that oil based stuff bake for like a week minimum in good conditions before putting water on top of it. Or just use oil based poly and save yourself the headache, it smells worse but it bonds right.
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seth_carr4mo ago
Remembered a time @harper_murphy when a buddy of mine tried to speed up his poly cure with a space heater and basically cooked the finish into this weird orange peel texture, looked terrible. He was so confident after two days of drying but the humidity was high and it just wrecked everything, had to sand it all down and start over. Patience is Absolutely the key with this stuff, you can't cheat the clock no matter how many tricks you try.
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