RE: Predator and 3-d ASAT too expensive? TRY THIS
Maybe hang them in the sun to fade them some. Don't know if they'll fade or not, but, worth a try. Kudos for your creativity and saving a ton of money!!! Scent Killer (brand) by Wildlife Research Center, detergent is odorless and has no UV brighteners.
When we built our tower stand last year, we added leaves like you have on the fall suit. I lightly sprayed some flat paint on them to take down the "shine" you are worried about. Worked quite well. Don't know if there is fabric paint that has a flat finish or not. Easy to find out tho. Michael's (art store) would know.
PS. Would you make a suit for me? Maybe 2, one for early season and one for the later.