I just tried to fix some chips on my three part white pearl clear painted a8. It takes three paints for that mug-
white base, pearl stuff then clear. I got rained out mid job, so no photos....
The white was easy enough, and I did the lanka thing with that to level it- but the pearl paint layer does what you said your silver does when lanka hits it- it dulls. I guess the mica flakes are near the surface.
I got pretty good results with an airbrush- I tried a paasche h medium and a plastic hunk of crap from tiawan. The hunk of crap airbrush only cost 9 dollars, so it was doing good to work at all.. It's actually ok..
The plastic handle kinda disolved when I cleaned it with acetone tho..
It started raining before I really got things like I liked them, but so far it seems that you can fill the chip, then lanka it level, then to get the metallic shine or sheen or whatever right, top the repair off using an airbrush. The paasche h is the best airbrush for automotive touch-up paints I have tried so far- I've only tried three-.
Dixie airbrush has a paasch h set for 27 bucks- really good for a solid american-made brass tool.
For 9 dollars the tiawan hunk of crap does pretty good-- I think the brand is central pnumatic sold at harbor freight.. Both sets come with adaptors for use with air compressors or cans of air (propel).
Both brushes managed to spray unthinned factory touch up from a spray can. I sprayed it into the little jar. The brush-equipped paint is thicker usually, and may need some lacquer thinner added...
everything is a work in progress..