I used the soldering iron to remove the plastic along the rivet lines of the F771 top skin. The holes were then deburred and dimpled using the Avery C-Frame tool. This may be one of the last times I have to break out the C-Frame dimpling tool! Once the skin was dimpled, I deburred the edges using a small scotchbrite wheel in the die grinder and then I removed all of the plastic. Done deal.