Today I replaced one of the original OEM spark plug wires with an aftermarket one I got from Beemer Boneyard, put the painted fork sliders on, cleaned up the axle, cleaned up all the front end bolts on the wire wheel, put on the Parabellum fairing and grip guards and rode! I can't believe how this bike has responded to all this attention...I can't remember it ever having run like this, even in the absence of an exhaust gasket which I plan to do in the next couple days.
Looks like you got a nicely finished result:looks like a match to original
Yeah -- I'm very happy with the Rustoleum black satin match. Here's the painted slider next to my other K75 which was garaged and in good shape before I got it so the original finish is pretty intact.

I don't know how it'll hold up but it sure looks good now!

Here's right end of the front axle before and after treatment with wire wheel and Flitz:

The only bummer in this whole thing has been the paint match I got from a Glasurit dealer...but that's the subject for a separate post.
Van