I have several engines that are seized up. Not my fault as I have yet to actually fly a plane yet. All this stuff was given to me by my grandpa and I am really trying to get into the hobby. So I am cleaning up planes, going to recover a few of'em, get new batteries for my transmitter and receiver, etc. It's gonna start getting warm soon and I want to get out and get them running to see if I have to buy new ones or not. I used regular glow fuel to clean up one, or just to get it where is wasnt seized up, however, the outside looks all gummed up.