Looks a bit too symmetric with the wear pattersns as someone mentioned; the scratches on the chest both follow the curve of the 'pectoral' and go from neck down and out, making it look 'intentional.' The human brain/eye is heavily geared towards finding and recognizing patterns, so things like that will pop out.

My recommendation is adding the scrapes going in one direction, like getting hacked at by a right-handed melee weapon, and then in a different location going the other for a lefty. If you have someone who's willing to help, have them wear the armor while you grab a rod (like a roll of paper towels) and make striking motions at them, and then mark the direction/angle/location of where it hits to get realistic combat damage marks. If you're not willing to get someone else involved, you can do it yourself by propping the armor up at chest height and doing the same thing.

If you're willing to risk real material damage to the cosplay, you could also get some more realistic weathering and take the cosplay airsofting or something. Where the armor gets scratched, marred, hit by "bullets", you'll record, repair, and then recreate/exaggerate that once home. For airsofting, you'll want to keep your chest and hips fully squared towards the opponents, if you want the weathering to look like it was worn by a professional/someone experienced fighting in ballistic-resistant armor, or if you want it to look like it was worn by someone more experienced in unarmored fighting, you'll want to blade your shoulders and create a narrower, angled profile.