mid america-sanding tread bumps & spacers

[plhiatt]

What grit paper/technique is best to clean up the material around the tread bumps from the machining process? Under magnification you can see a bit of excess material there leftover.
Also looks like it you still need a washer as well as the wheel spacers to keep the reversed wheel off the body. Is this right or does the wheel spacers friction fit work to keep the wheel off the body? even with oil or graphite causing the spacer to maybe slide more freely.
Thanks.

 

[bracketracer]

You either need to clearance the car's body, use a longer spacer, or slip a washer between the regular spacers and the body to get clearance for the sidewall and lettering on the MA style reversed wheels.

Did you try a soft toothbrush on the tread bumps already? Those are easy to damage with sandpaper.

 

[plhiatt]

Nope have not tried a tooth brush, but I will give that a try. I think one washer with the spacers will be just enough.
Thanks

 

[ngyoung]

I did take like 4k grit and set it flat on a table then put the car down and gently turned 1 wheel at a time a few rotations. Also did this for my son's pack car before districts since it had a few nicks.

 

[Cramjet]

I did take like 4k grit and set it flat on a table then put the car down and gently turned 1 wheel at a time a few rotations. Also did this for my son's pack car before districts since it had a few nicks.

That's what I planned to try but I can't think of how Bracketracer is using a toothbrush in this situation. Without having a toothbrush and junk wheel handy to try, you would think you would make a bunch of scratches all around the edge of the wheel. He is probably a level above my understanding here, which happens from time to time with that guy ;-), but I have no doubt he somehow makes it work and there is a good reason behind it.

 

[bracketracer]

TOOTH brush not WIRE brush Cramjet. LOL. A soft tooth brush won't scratch the wheels.

The OP said he had material in the tread bumps from the machining process. When the lathe bit passes over the tread bumps the interrupted cut can make it chatter and it can leave burrs between the bumps. So if you scrub it with a tooth brush it may clean it up without harming anything. If it doesn't, then the OP will have to step up to something more aggressive. I'd probably opt for a nail buffer next, starting with the smoothest face only going coarser if needed.

 

[Kinser Racing]

I always "Clean" new wheels. I usually opt for the magic eraser.