Bubbles in my polyurethane

Hi all! I'm currently finishing a tabletop with polyurethane and I've never worked with it before. I applied two coats to the underside as a test and I'm getting a lot of air bubbles that I'd like to avoid for the top. You can see an example at the bottom of the picture. ​ Bubbles :( I'm pretty sure the bubbles are from application. I'm using a soft brush and I notice bubbles when the poly first touches the wood, which I assume the brush is causing. Between coats I've been rinsing my brush with water and keeping it in a bowl of mineral spirits. I then shake the brush for a bit before starting the next coat. Is that the best way to store the brush? Should I be using a new brush each time? I really have 2 questions: If I get bubbles on my first coat, should I sand it off and start over? Or will sanding between coats + applying more coats solve the problem? What should I do with my brush between coats? Thanks for you help! submitted by /u/cschoenwetter [link] [comments]

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