I have two boards that have pressure dents on the bottoms. Not huge but they bug me. I've seen people (mostly with liddles) with what looks like bondo or body filler used to fill them. I'm wondering what the process is. These arent top-shelf boards so I dont really mind some grey patches. I've used Q cell but find it to be too runny to set in these types of dings, where bondo can be more clay-like and easier to work with, so I'd imagine. What type of bondo is used? Whats the process? Is there a top coat of resin? Or if I should not use bondo like this, you can talk me out of it too.