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Finishing Tips: Understanding the Difference Between Polyurethane and Polycrylic
I'll also add that water base finishes can dry very quickly - large surfaces can be a challenge keeping a wet edge. That can be nice though for smaller projects or parts because they can be turned around so much more quickly - a real advantage in a small shop with limited real-estate for leaving parts spread out to cure. And that fast drying also means less time for dust and airborne contaminants to settle into an uncured finish.
oil base finishes will amber a light colored wood. water based doesn't, but in my opinion looks terrible on medium and dark colored wood. on walnut? completely unacceptable, looks like chocolate milk. cherry and red oak? hope you like pink!
I'm curious about the differences in strength between wipe-on polyurethane and regular polyurethane. I tend to use wipe on (and it takes about four coats), but so far, looks/feels nice. Is there a huge difference between the two?