Hey y'all, I'm in the glorious yet tedious finishing stages of my latest build and keep running into a pretty frustrating issue. Using Minwax satin wipe-on polyurethane I've built a considerable number of coats on the body of the instrument and have things baby-smooth all over. The problem is that there are several large spots on the back of the body where I appear to have sanded through the top coat, even when starting with gentle 2000 grit wet sanding (see photo). This has happened with earlier coats as well in various places. I have taken care to apply with an even consistency, and have been letting it dry with the front-side up for 1:45 per coat when doing a series. I'm trying to figure out how to go about correcting this, having recently educated myself on the properties of poly (and the general importance of thin coats), but I haven't found a huge amount of info on this specific issue. I know I have to apply another coat, but I don't want to waste time trying to apply the wipe-on the same way, resulting in the same thickness, resulting in the same issue. What would you do to get a thicker final coat so this doesn't happen? Try a second application a few minutes after wiping the first on to get a thicker layer? Buy a can of brush-on and use that? Start at a grit even higher than 2000 when doing finish sanding or go straight to buffing? (there are usually still a few dust nibs to get out each time) Any thoughts from those out there who have fought this struggle?