Hope this helps
1. First thing I did was wash the surface with some warm soapy water to get rid of any moulding waxes or oils that would stop the paint bonding.
2. Once dry I rubbed the surface down so the paint has something to bond to. You don't want to leave any surface scratches so I used 2 fine papers, 600 to rub down the bulk of the surface area and then 800 to do the edges, a rubbing block made this easier.
3. Make sure you rub down all the edges on the inside of the VW as this is where the paint will be weakest and will chip or flake off (careful not to scratch the black plastic under the chrome VW)
4. Once the surface appears non-shiny all over (you may see some bronze colouring, this is fine) you need to clean all the dust off. If you have Brush cleaning spirit or alcohol this works best. Then rinse it under some water and dry off.
5. To paint I found it easier to hang it from something, I used a light shade and some wire coat hanger, securing it with masking tape to the back of the badge.
6. When spraying don't spray directly at the badge. Start slightly to the side then move across at a continuous speed holding the can about 10inches away (not a mans 10inches either, a real 10inches
) I used halfords primer and Halfords Satin black. Matches the black of the grill perfectly when clean.
7. Allow each coat to dry and build up until you are happy with the look, ensuring that you do all around the edge. I used one coat of primer and 2 coats of black. I dried mine in the kitchen oven at 60 degrees for a couple minutes after each coat then left it out overnight to dry completely.
Oh and to get the badge off just twist it a quarter turn to the left and pull out, very easy. Almost to easy actually if some thieving git takes a fancy to it.
