Yeah it's one of the main reasons for doing the frame off,. They are 40 year old lines so it's to be expected I suppose.
That's not the worst rusty one either!..
Its becoming more and more attractive now mec lol!
might just do it and be done with it, although other paint options have come to light but they might be not worth the hassle.
Great find Eric on the motorbike trailer that fits the chassis btw never would have thought of that

Shane