Thank you for that tip! I was thinking black plastic otherwise, because matching silver can be a pain.
I had already bought aluminum bar stock for the lower support long ago, but my fab plans were on hold until I had cleared space in my dad's shop to do the work needed. Aluminum flashing would match up ... without corrosion.
For attachment points, I was planning to follow on MetroMPG's mounting brackets made of copper tubing.
[url]http://ecomodder.com/forum/showthread.php/diy-plastic-rear-wheel-skirts-geo-metro-103-2.html#post37306[url]
However, since VW tends to make the fender lip fairly wide, and flush with the inner fender lining, I was planning to use mounting screws, since they're well spaced on the fender on the MkIV, and have them hug the contour of the inner liner, to the outside edge to mount onto the skirt. This would mean screw/bolt heads protruding on the outside of the skirt. To me, it seems a liveable design compromise. How are you mounting yours?
Hrm, and thinking back to the colour matching: Eventually I'll have to repaint my car. All that driving out in the western provinces was rough on the paint, both from me and the original owner. I'll be spot touching up some areas just to keep rust at bay before it's more than a surface issue. But, when the time comes to repaint the car, painting up the eventual side skirts would help.