Update to the Update
I was feeling good about the pouches, and after letting them dry fully I was happy with things so I set about adding some weathering to my flight suit. For my lighter parts I'm using Jacquard Dye-na-flow which is a very fluid dye/ink/paint crossover (used it on the hip pouches in last update too). I started with brown and black, thinned down and I began by just running the dye/ink really wet along seams and stitches, added a few layers at top-facing seams - the knees have a reinforcing double layer so lots of brown and black wash got dribbled in there. After that initial pass dried, I went back and added more streaking and spotting in the field: knees, elbows, on the torso and backside. I used brown and black again, and added Burnt Umber into the mix, which when thinned adds a bit of a rusty/brick undertone. I put the top on, added some colored liquid and smeared it with my hands to mimic wiping my hands off while working, bent my arms and soaked onto the points of my elbows and then expanded on the splotches after removing the top. I also brushed across the 'rumples' that happen at seams and smeared across to pick out the natural textures in the fabric. At the end when I had to break for sleep time, I put the pants on and wiped my hands clean on them, making sure to use up all the leftover colors built up on my fingers.
I'm pretty happy with the current state for a first layer. Sometime in the next week I'm going to do a kit-up to see how it is looking and see where I should be adding more Space Grime. If it looks good as-is I'll tap the brakes, because it's probably possible to over-weather.
Before

After my first pass

Closeups on the thigh pouches. Much like the belt pouches, I cut some upholstery foam blocks to fill them and promote the colors to flow around the shape of a full pocket. The blocks will do for trooping until I can create greebles and doodads to swarz it out.


Back views - put a splotch at my lower back for a bit of "dried sweat", and started on the seat of my pants - I don't think I'll do too much more there.


Added a little bit of a ring around the collar - if I'm armored down (to work a table or be a supporter) I still want the flight suit to show like a lived-in garment that's part of the star wars universe.

At the end of the night (after wiping my hands off) I put the hems of both legs into the remaining dye/water cup to let the last bits of color liquid soak upward into the legs. Turned out ok.

I have also started working on the darker fabrics in my soft goods - I am feeling too timid to dive in on my flak vest so I'm starting with the padded liners/spats I made to put behind my lower leg armor.
I'm using a Jacquard product called Neopaque - it's fancy fabric paint but I wanted to treat myself.
First step, as usual, is to test out and sketch. I worked on a dummy swatch of the quilted material I made during flak vest-ing.
I'd really recommend to anyone making their own soft goods to make a few swatches like this out of scraps & offcuts.
It helps me get comfortable as I try out new things before committing to the Official Pieces.

Once I felt I had a good feel in my brushing hand (still not 100% confident but I'm learning a lot of this as I go anyway) I went to town on the spats. I've focused on the portion that will be visible between the plates - the portion above, behind the shin plate, will receive a very light treatment so it doesn't look wrong if it gets exposed.
The main color I used is pain old Brown, focused at the edges and in the center of the raised quilted portions, bleeding downward into the stitches very little. I'm thinking it may be a little bit spotty so as I work it some more I will try to smear across panels more.
I added faint highlight lines of Ochre in the stitching (dab a bit, and smear with thumb to rub it in), and essentially dry-brushed the edges and some upwards into the stitches again with a pale, creamy not-quite white/not-quite tan color named Tanned Leather with a dab-and-smear approach.


I kept going with the lower portion in case I opt to forgo instep plates for comfort or whatever other reason.


Underside first pass - will probably do a bit more thinned brown in the stitching but not much more. It's a low visibility spot but it feels right to at least age it a little.
So far, so good. I'll hit the spats some more as I have free time over the next week, getting my eye and hand more practiced and then I'll get nuts on the flak vest.
I'd appreciate all constructive feedback and pointers for improving my techniques.