We've been discussing how to apply Cermark in the latest 'Yeti' thread- Mike Null and I (among others) mention how we like using foam brushes-
I'm in the process of a SS ID plate job, and had to Cermark five 3" x 6" plates.
So for fun I thought I'd set up the GoPro to record Cermarking them with a 1" foam brush: https://youtu.be/S7gp5Mtk6Oo
Here's the finished product--
1inchfoam.jpg
I couldn't ask for a better coating. It's not anywhere near too thick, and there's absolutely zero metal showing thru.
IMO spray cans or airbrushing couldn't do better.