On the first Moto-Bikes, I cleaned and polished the wheels without disassembling them. This was very time consuming. Typically the wheels were not close to true and have a mixture of overly tight and loose spokes holding the rim to the hub.
For this bike, I decided to disassemble the wheels. It made cleaning all of the parts much easier. Surprisingly, I think rebuilding the wheel was easier than attempting to true a badly out of round one.