Hi All, I'm in the buffing and polishing stages on 2 Teles and I noticed I have some sand through in areas of my black coats, on my burst. Particularly in Neck pocket and on the bottom of the guitar. I do not have time to re-shoot the black and clear coats for these 2 small areas and was wondering if the Markers sold by Stew Mac actually work? ...and...Do they need clear coating after or are the ready to go once dry? Also, is Stew Mac the only place I can get those type of markers? Anything like them in A/C Moore or Michaels that wouldn't react negatively with a Lacquer finish? Thanks in advance for your help!