I just started to do the wet sanding on my new parts caster guitar, and decided to use mineral spirits for the first time as a lot of people said that won't cause a problem with wood swell which had cause the problem in the last guitar that I refinished. However, I now have these bubbles that look like pimples on the end grains and they are filled with mineral spirits. Has anybody ever had this happen to them? It looks like middle spirits may have gotten into some ingrained in the string holes and then traveled through the grain to the other end. What should I do? Given that the finish has separated from underneath, it looks like it's going to have to be stripped and then refinished. Thoughts?