Thanks guys, some good advice as always
I should have explained in the original post I've already discovered the forks had been repainted in red at some point, along with red paint on the Major Taylor stem over some very worn chrome. I've already decided to get the forks repainted in black and have the stem re-chrome plated. Returning it back to how it should be
I guess that triggered the question about the decals, as some parts are going to look new, should something be done about the decals.
I think I'll leave them for now until I get it reassembled and then post some more pics of how its looking. One good thing is that the decal is quite thick and I've been able to get a brass rubbing type copy onto paper