Ponton Mercedes-Benz 220a with fitted luggage, © Daimler AG
In the beginning I thought that the bumpers would be in such a good shape that I only had to polish them. The first inspection in probably 20 years revealed that it was not the case. The chrome was not only in a rather bad shape, the bumpers and bumperettes were also scratched and had dents. I was responsible for one or two things but obviously the usage over so many kilometers and years, partly on salty, Swedish roads, had left its marks.
First step was of course to disassembled them. Thanks to my father’s Tectyl treatment everything loosened nice and fine. However good the Tectyl had been for the bumpers, the chroming company wanted the parts cleaned from it as well as paint and rust.
I degreased and sandblasted them. The rust under the bracket holders was however too severe for my equipment so I had to take them to a sandblasting company together with the brackets.
As usual all screws, plates, washers etc was cleaned, sandblasted and plated. In some of the pictures you can see additional parts for the braking system as well as the pins etc for the spare wheel.
The brackets were powder coated. To be honest I did this by mistake and under stress, by recommendation from the sandblasting company. My opinion of powder coating is that it looks very good, is not as brittle as paint and hence can stand chipping etc better. But, if the rust gets its grip under the coating you may have problems discovering it since the rust can lurk underneath it. Well, now it is done.
The rust free bumper parts were handed in. The company was responsible for fixing dents, scratches and everything. I also told them to fix the holes for the “under-the-bumper-daylight-lights” in the side parts of the front bumpers (popular/mandatory extra equipment in Sweden during the 70 & 80ies). Unfortunately, I forgot to verify that this instruction was written down in the work statement. I discovered that when I did the check before the last part of the process, putting the chrome on. As you can see in the pictures everything has the last copper plating and are polished to perfection. I decided I didn’t want to pay for another round of work on the front bumpers, so I will have to live with these two holes. Won’t be visible, but annoying to know they are there.
The inspection revealed that one rear, side part had to be adjusted before the chroming as well as to wheel covers, one had a dent and one “dust particles” in the copper (I did the wheel covers on the same time as the bumpers, see article Wheels).
After the necessary fine tuning, the parts were chromed and the result was perfect!
Chromed Ponton bumpers and sheet metal