>>6244901enamel weathering products from AK / MIG, specifically their streaking grimes, apply them, let them sit for a few minutes, then clean up with a brush damp in white spirit. That said, I rarely use white spirit to clean up, I mostly just use a dry cotton swab and adjust the streaks until I get them looking the way I want them to. I find that a brush damp in white spirit just eats the streaking grime away far too easily over an acrylic coat.
I apply the streaking grimes using those very thin / long paintbrushes that I made by cutting a bunch of hairs from the paintbrush itself, dip it in the streaking grime, and then wipe it once on a paper towel to remove some of the excess grime from the brush, then very lightly I make the streaks.
I'm going to probably use some oils as well to try and add a little fading here and there on the hull, but honestly I don't really use oils all that much as enamel products can do a lot of what oils can do themselves.
The enamel paint (neutral gray) is what I used for chipping / wear on the hull, using a fine-tipped paintbrush to apply it very lightly. It's just a darker gray tone that stands out from the other colors and I think works for adding some wear and tear to the hull. I'll probably add a few darker, rusty type chips too as I continue to weather.
That dark brown fluid in the jar on the far right is MIG Dark wash that I've had for years. It's a nice dark brown color and I use it all the time as a pin wash.