The advantage of building from kit or plan as against ARF, etc., is that you did it once, so you have an idea - even years later - of how to do again what is needed.

Magician is a fine flier! Clean it up; correct what's needed, and enjoy a great model!

Have you tried a wipe, say 3-in-1 on a paper towel, on the leadouts to see how much is left usable? Might be more that you think, but if it isn't, you'll be sure you need to replace them. If that's the case, it WILL be worth the effort.

LUCK!