Remove lettering

How do you go about removeing lettering and or emblems from a loco and or train cars, without wrecking the paint underneath? I have an LGB loco with a lake george & boulder emblem on it. Thanks

What I use is a decal setting solution and a ink eraser. I found a pencil type ink eraser with a brush on the end. That way you can put a point on the pencil and get into the little nooks and grannies. The pencils are probably going to be hard to find because they are for typewriters. We all know what happened to them. Mike Dickinson