I've finished putting the final coat of Helmsman on my bar top and it looks absolutely stunning! (this is my first 'serious' project, so excuse me if I seem to be more than just a little proud!). After reading various posts and websites, I thinned the first coat 1:1 with mineral spirits, then put the remaining three coats on full strength, sanding lightly with a 220 grit before each coat. The finish is now like glass! However, there are occasional bits of something that easily come off with a fingernail. I'm speculating that they're bubbles - not too ugly, and they'll probably wear off in time. My concern is that people will not resist the temptation to remove them for me and, in so doing, potentially damage the finish. I've read that my next step should be to wet sand with a 400 grit, then hit it with an automotive polishing compound. Will this eliminate the 'problem', such as it is? Frankly, I'm reluctant to take this last step because I just know I'll screw it up. The Helmsman seems a bit softer that most finishes (it supposedly can accommodate temperature expansion/contraction of the wood), so I don't know how it will take to this final step. How about a paste wax? Will these bits be eased off while buffing? Is a wax product good for a spar urethane finish or will I be creating other problems?
Any other suggestions/recommendations?