Everyday TR1 - improving front brakes

Lately I did some work in order to get the rear drum brake to work as it should. The front brakes are actually working very well with the right pads, but... they squeal a bit.

In general these calipers are meant to slide freely along the center holding pin, once this one gets a bit sticky, the caliper will not align perfectly* perpendicular with the brake disk anymore.

As suspected the slider is sticky and the silicone paste that was on there has vanished. (Been washed out.)

After quite some scrubbing with a brass brush removed most of the caked on residue, yet still the surface felt somewhat rough.

Therefore the next step was to attack the slider bushing with a small polishing disk and polish it to an almost mirror finish. 

Then reassemble the whole lot and lo-and-behold the brakes feel more crispy. Especially the point where you can feel that they start to bite is more precise. The squealing? Well, it improved...