never messed with piston weights as I don't have a lathe.

Rear piston bearings I don't mirror polish. I just use finish emery that still shows sanding marks. The marks will retain lube and I use moly paste on the rear bearing.

Seal, sized so it can be gently pushed down with one finger for me. Again, moly paste rubbed in the sides but wiped off. The sanding marks retain enough lube.