I had the little 172 in for a check over at the weekend and all seems well. I assuemd that threar disc probaly needed doing but I think I only assumed this due to surfacr rust. The ABS ring is till very clean. I took some pictures and wondered what your thoughts were:
P3081537 by ben.notman, on Flickr
P3081535 by ben.notman, on Flickr
P3081537 by ben.notman, on Flickr
P3081535 by ben.notman, on Flickr