Update:
I found Waxoyl at an MG specialist. Its the prefered rustproofing for the Britcar crowd. Price is right and easy to apply. Not looking for a miracle, just to delay the inevitable. Everything good comes to an end eventually, even our MB's. RT

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When all else fails, vote from the rooftops!
84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K