Not too long ago, I started watching the YouTube channel of one 'BaremetalHW' who does restorations of vintage Hot Wheels cars.
What has this to do with O gauge?
Some may remember a thread on re-creating a stainless/chrome-like finish on passenger cars (and maybe F3's with stainless panels), and one of the lead contenders was Alclad, which does produce a very nice finish, but needs a fair amount of prep work, and being fairly toxic needs to be used with all the appropriate accoutrements.
Back to the Hot Wheels. As part of the restoration process, one occasionally needs to refinish parts that were once chromed, but are no longer (an example would be engine blocks in cars with opening hoods). One of the methods of dealing with this is a 'chrome marker' made by a company called Molotow, that produces results pretty close to Alclad. On one of BmHW's recent videos showing the use of one of these pens, a commenter pointed out the the chrome "ink" is available as a refill that can be used in an airbrush. Today, a video appeared on BaremetalHW's channel demonstrating the use of a Molotow chrome refill in an airbrush:
What's striking is the comparative lack of prep work needed to produce the results seen in the thumbnail image, and being an acrylic paint, no noxious fumes are involved. On top of that, this paint can be clear-coated with no appreciable effect. But if one really needs to see this applied to a train, well, ArtPrimo demonstrates its use on a pair of cheap HO boxcars (caution: lots of speed-metal music and "Duuuuuuuuuuude"-isms --)
---PCJ