If your wheels are really original ones ; they have been treated with aspecial treatment nemed "chromate" and then painted in gold so years damage corrosion have not done that bad work you can find on racing magnesium wheels getting only a miror polish after machining casting when they where brand new
This one the good good point ; in an other hand concerning load on the magnesium , considering they are stradale stuff they probably did not suffer much but who never know !
There are 2 sort of inspection; one is cheap and you can do it on your own but it is mandatory to have those wheel sand blasted ( not with sand but "nuts chips" and it's the same effect ) to take off painting and then apply a red product ( it's a spraycan) live it for 10mn , clean and then spray the second white product ; if some red lines comes you can just have those wheel as seat of memorabilia
If everything is ok you will need to paint them again and if you now some body able to do some Alodine treatment before it will be much better
Second test is With X rays or better IRM tecnology but no many company do this and the process is cost less for a privater
Hope this helps
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