Simple solution to the Gloss vs. Satin spray.
option 1 - spray the gloss since you know it doesn't ruin the wash job, then mist spray a few coats of satin over after curing. Should take out the gloss effect.
alternatively, option 2 - Anti-Shine Matte Varnish Spray from
http://www.thearmypainter.com .... I use the varnish dip method for knocking out hundreds of skaven and tyranids for warhammer, and it leaves a high gloss shine. This stuff takes it right off. Pretty sure its just a matte or satin clear coat, but its an option nonetheless...