Gear honing I have just used some Brasso to hone a brass-brass worm-gear set. I worked a treat (and the gears are all shiney! ) I assembled the gears, motor and etched gearbox. There was a bit of a sticky bit on the gear so I put some Brasso on with a piece of tissue. I turned the motor by hand to make sure it rotated without too much resistance. The I hooked it up to my power supply and ran it at the lowest speed that it ran smoothly at (about 2.5volts, it is a Mashima 1020). After running it for about an hour (changing direction frequently) I put a rag under it and sloshed 3 in 1 oil over it to wash the brasso off. I runs nicely now and hopefully will for a long time as the design of the kit is such that getting it all out when the chassis is finished will be a real pain.