raimundo wrote:Wiper inserts?
Yep, my mechanic saves them for me.

I also purchase 304 stainless from an online source in larger sizes. I have a 6"x18" piece of 24 gauge on the way to make some wider ones.
I use a spiral key extractor to do the layout.
A dremel with a heavy cut off wheel for the rough in, as well as a bench grinder.
A dremel 1/4" cylinder grinding stone for smoothing the edges as well as various small files including a broken impressioning Grobbert file.
For finishing, I use a medium and fine Arkansas stone with the tool held flat on a piece of wood, then I finish with 600, then 1500 paper using rubbing compound, then a final buffing with a dremel polishing round.
Don't believe everything you think.