Well, ditch that. At the suggestion of another DIY sailor I tired a notched roofing nail.
- The drill bucks less. Particularly helpful on larger holes.
- The dust is finer and hence easier to remove. No need to dig it out with a nail.
- You are less likely to miss a spot, though as the pictures show, both methods can do a very nice job.
Notched roofing nail
Dremel cutters work, producing fine dust that is easier to remove, but the undercut is only 0.09-inch vs 0.19-inch for the bent nail or roofing nail. By the time you cut a bevel for sealant, there isn't much left for a seal.
The right tool for the job bay be the notched roofing nail