I’m working on a project in which I drilled several hundred additional holes into a pegboard. Hindsight is 20/20 and I definitely should have put a backing board to prevent blowout, because now I’m left with a mess on the back of the board that I would really like to get rid of.

Sanding hasn’t worked unfortunately, and I’d really like to avoid having to take a knife to each of those holes 1 by 1 or having to drill these again (I don’t have a drill press)

https://i.imgur.com/ZVvByNx.jpg https://i.imgur.com/Talbn7Y.jpg