Shellite from bunnings.
I it is really nasty - Try Goof Off. I've used it before with great results on STUBBORN residue. Use in a test area first.
Thanks Nino, I've got plenty of shellite, but I seem to remember hearing not to use goof off as this is mistaken for goo gone.....have you used G-off on diamond plate before? If so how?
Not on a diamond plate - just EMs and SS.
