300D-Getting rid of body rust.. - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 07-20-2011, 01:40 AM Thread Starter
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300D-Getting rid of body rust..

i had my 300D repainted about a year and a half ago. but my big mistake was..i had not well supervised the painters...so there were rust again by this time..i wanted to do again the painting..any tip pls...so the rusting will be minimized..thanks.
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post #2 of 4 (permalink) Old 09-15-2011, 03:39 PM
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Cut it out and weld in new metal. Grind out what ever is not practical, use a rust conversion then a 2 part epoxy primer. Make sure everything is sealed, undercoated etc. Don't fall for the slop some POR 15 on rust and think it's all well and fine. If you cover it, it will return!
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post #3 of 4 (permalink) Old 09-16-2011, 12:11 AM
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Body repair work was poorly done or not done at all. Have the car's body thoroughly checked for rust by an expert before you do any painting. There are many places where you don't see any rust on the surface but lots of it underneath unseen. These will create more problems later on and will not be fixed by simply painting over them.
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post #4 of 4 (permalink) Old 09-18-2011, 01:30 AM
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After the visible rust is cut out and repaired properly , you must also spray the insides of the panels and pillars with a rust inhibiting wax/penetrant to help prevent further deterioration.

Just leaving the insides of the repaired panels dry (after all that welding) is asking for more corrosion.

'76 - 300D
'72 - 240D (noddy)
'40 Chev pickup
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