I see. But unfortunately, my supplier doesn't have the aldad brand. I'm not sure if they can get one. But on the brighter side, they have other matte spray-ons as well as bottled matte coating as well. Will this help solve the problem? I mean using matte coating no matter what brand it is.

And last thing, do you think it will help if I primed my subject first with Mr. Surfacer? Thanks!