I have a Lionel Whistle tender, with metal wheels and axles, but the part of the trucks that house the axles are plastic. The wheels are really filthy with accumulated black gunk. The contact rollers are grungy too.
I understand that contact cleaner would clean these right up, but if I spray it on, will it melt or damage the plastic axle housings? Will it melt or damage the plastic (or maybe rubber) coatings on the wires underneath the frame?
Thanks for all advice.