Rustproofing a R129

[harry kular]

As part of readying my car for use this year, I thought I'd get the underside areas rustproofed. are there any key areas that should be given particular attention? Was thinking of Bilt Hamber or Ditrinol(?) products- if anyone has a recommendation please let me know.

Thanks

Harry

[S800VXR]

Got a load of Dinitrol 4942 if you want to buy it cheaper... Brought but didn't need in the end. So long as you clean the areas to be treated its brilliant stuff.