Dear All,
Europe is full with very clever politicians, and very-very clever scientific advisors of them.
For example: try to imagine our situation about the quicksilver:
traditional clinical thermometer is banned, since the quicksilver in is poisoning, therefore manufacturing has stopped and import is banned.
BUT
The quicksilver in all fluorescent light sources cannot be poisoning, since they are preferred, being more efficient solutions related to incandescent lamps...
So I remain by good old cadmium plated spokes, but my canopy is hermetically glued on my model already: I hope, the sight of the mechanism is not poisoning itself...
One another thing - to think on... (since several colleagues appreciated the copper as good soldering basement) :
In the elementary school we learned in Chemistry that immersing some clear iron or steel object into blue vitriol (Copper-sulphate) solution, some copper will cover the iron surface. (No electric current needed). I think that blue crystal is available in every agricultural shop, since it is a traditional basic material of spraying of every vineyards...