Hi jorgen,
where did you get your wheels? I am looking for spare chromodoras. what design are the spokes? the 5 spoke stars?
I have a set of chromodoras on my 67 duetto. They are made of magnesium. I had some curbings on mine and I wanted the curbed rim repaired by welding new material on the rim and machining it back. I brought it to a rim repair shop and I told them it could be magnesium. They were apprehensive about welding mags because unless the welders have special equipment to weld mags, the whole wheel can go up in flames and it burns really hot and bright and I am told that a fire extinguishers is useless to put out the fire except I suppose flooding the thing with halon or whatever.
To cut a long story short, he filed some filing off a curbed damaged area onto a piece of paper and then put a light under the paper. after a few seconds, you could see the mag filing flash before your eyes even in the bright noon sun here in the tropics.
So I guess if your wheel is has some damaged, it doesn't hurt if you were to file a little to try this experiment... those with chemistry background can perhaps suggest a better solution?
Anyway, like you, I was looking for information about mag rims etc and I have attached one of the hyperlinks to this site which is quite fun and interesting to read.
http://www.sportcompactcarweb.com/te...cc_wheelguide/
Have fun
fgc