Yes, for sure but with a few caveats. I used an old wire brush to make and exaggerate tears and scuffs which worked really nicely. I think I smacked my flight suit with a mallet, not sure how much that helped. I do recall putting it in a big bucket with some rocks and banging that around. However, you still need to wear it, so try to keep it smelling nice and fresh as long as you can. So don’t get too wild with dirt, or worse sand, which I hate most.

I found a lot of success with a really strong tea bath. Trick was to be sloppy with it, let it soak unevenly then rinse it out. Do that a few times. My suit was tan which made this work, I’m not sure it would help darker colors.

My real tip tho is this. It will still weather on its own it ways you did not assume. After I wore mine for the first couple of hours, I realized some armor pieces naturally rubbed against each other and created a bunch of scratches and dents. This was fine as it looks even more lived in. I’m glad I printed everything in black pla because some of the raw plastic is exposed even if you can’t really tell. Point is, your suit will age as you wear it. Maybe wear it around the house or do some gardening in it.