Here is my first ever print made with a fumed silica pre-treat. I'm not sure if I'm getting the full benefit of it. The print was made with 20 drops Platinum, 20 drops Palladium, 4 drops 5% Ammonium Dichromate. 14x17 inch FP4+. Bergger COT320 paper. I'm getting some graininess and a little mottling which could be from the dichromate, and I think some of it is from (possibly) uneven coating of the fumed silica - see lower left corner.
Apologies for the image quality - I had to do this with my cellphone as my home internet connection has been incredibly unstable the last couple days and I could not count on being able to upload from my Mac.