I've primed and painted the wheels using Halford's "Stainless steel" wheel paint. It's verging on samey with the body colour but its growing on me.
The centre trim tops were cleaned off with a well worn angle grinder disc to remove the VW logo. The plastic is tough so It took a while but the result is flat. They were "Plastigrip" primed and painted with bright silver.
The trims in full silver just didn't look right so the flanges were over-painted with satin black. The Fiat roundels are an ideal fit so it looks OEM.
The image shows stainless retaining screws but the black trims are now retained with black finish M8 bolts into the disc alignment pin holes. This will be inconvenient for wheel changing, so plan to thread the pin ends and use dome nuts.
The wheel bolts look horrible so I have some trim caps on order. Worth a try at £5 for 20 .
Incidentally, the disc retaining pins are on the same 98mm PCD as the wheel lug bolts.
Final pix with blinged lug bolts and black trim retainers to follow.