Sharpening tiller tines

[worth1]

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I've used a big sanding disk on a big right angle variable speed buffer.

If you do not have at your disposal the equipment that Worth1 uses as well as his mastery of all kinds of manual work you can use that kind of flap disk, choosing the finest grit available at your shopping place.

Yes thanks.
Also the big right angle polisher doesn't blow your ear drums out from the noise.
The Milwaukee polisher is for polishing clear coat and paint on cars.
Top speed is around 0-1750 RPM I think.
Biu you have to consider feet per minute with the larger surface.
I've used it for everything from car polish to metal work and wood work.
Bought mine years ago.
Can't believe how expensive they are now.
I also have a Milwaukee right angle grinder that I put a diamond cut off wheel on to cut thick steel plate.
I carry a bench grinder in the work van to sharpen drill bits.
I also have flapper discs.