I was out last week looking for something in my garage and came across a bag of old engines I had way back when. I pulled out my old VECO .19 I used for U-Contro and free flight, even an old McCoy .19, everything in that bag rolled free and clear. I must have cleaned them up before I put them away. I haven't seen these engines sense 1977 or 78? I bought them in or around 1960 or 61. I usually clean engines going into storage and leave them dry, no oil or anything after an alcohol flush. I lived in Calif. so there wasn't a lot in the way of moisture so there was no rust at all in these engines. Even my old .049s were OK.