wait wait wait.. amber? or the selective yellow color?
if the selective yellow (3000k) use vinyl.. first.. using hair dryer and some distilled water as prep. see if you like it.. tinting with paint is permanent or you have to sand and polish it if you dont like it..
if amber you want; there is that 3020 leds in ebay that you can put in your fogs..
or you can buy 880 series bulb with yellow tint, i suggest the mtec ones.. or nokya; w/c has been good
The fog lights are the 881 bulb. These are only 27 watts and not very bright--their only real purpose is to light up the right side of the road so you can see the fog line or the ditch. If you just want the amber appearance, the do-it-yourself coating or LED bulbs will give the amber glow. If you want to put light on the road, look at the Nokya 2500°K bulbs on fleabay or elsewhere...but don't count on much of the light hitting the road from any of these weak 881 bulbs. And, there is no substitute that is better. Some will put in HID lighting, but that produces glare, not what anyone wants for fog driving.
They make a nice kit with clear film to protect your headlight covers and amber for the fogs. I think I will get this soon. Then try to find yellow bulbs (perhaps Nokya) when the white bulbs fail. The protective films will protect the plastic lenses from clouding due to sand and salt damage, and they don't diminish brightness. I have a similar product on my BMW.
I have also seen posts on the BMW forums where people take apart their lamps and paint the chrome bowls with yellow "stained glass" spray paint. Looks good and works pretty well. Some folks stick with white bulbs and others take it further with yellow bulbs.
My rant; White is useless in fog and snow and causes glare in rain. White is only useful for more light when driving in the dry. I do not understand why these lamps don't come from the factory set up yellow.