[Bob Moseley (RIP)]

Hi Tony - WD40 is pretty useless. I have found that applying diesel and heat from an oxy plus tapping with a hammer will quite often shift that rust. I'll have a look in my shed in the morning as I know I have a floor plate. Just have to see if it is Ford or Chev. The other thing with sand blasting. Quite often numbers and unit signs are hidden under layers of paint. A gentle wet rub quite often reveals them.

Bob