Nah...recently been treating rust on a fifteen year old (or there abouts) R5 GT-T. Some of the rot holes in the sills were so bad I could get my foot in them 
Also holes in arches, filler area, some rot under car, bumpers etc. Jacked it up, stripped the paint, slapped on the Kurust (good stuff that), cut away the worst bits, got new plates, bolted some, welded others, removed tank to carry out welding, sanded new metal, primed, painted, lacquered, refitted tank...hmm...new car it is then Somehow I think it can only get worse again.
