I did file off the Chinese writing/characters on mine. Felt it was an immediate improvement in looks.
Yes, that will happen on mine to! After the bearing mod, the thing I want to tackle next is the power piston side, it has a brass Cylinder bore BUT a brass piston as well...in my trade we try to avoid rubbing the 2 same materials to gather and better still to have 10 points of (hardness) difference on the Rockwell scale between the moving(touching) parts. I need to source some hard graphite rod to make a new piston but plan to try polish bore and turn an aluminum piston to see if that cuts down on vibration at high speed as the Aluminum will offer lighter reciprocating mass.