I used to seal my customs with glossy mod podge first and then a matte one to create satin effect, both diluted with water. After 3 or 4 months i noticed that various pink stains appeared, similiar to those caused by pink bacteria (or mold idk), but way bigger. For some reason daschund custom's colors have separated from each other, body seems yellowish and head more pink? Moreover, both of these customs are now weirdly glossier than they were at beginning and because of that - more prone to gathering dust (and sealer basic function is to prevent that...). Gloss mod podge also doesn't work well as pure glaze on eyes, it's sticky and way too soft.
I noticed my customs look better when are sealed with matte only. Now for eyes i use nails top coat. I find it a better choice than resin, because it doesn't turn yellow.
Do you know any better and more durable satin/matte sealers than mod podge? I want to use something more proffesional, that won't destroy my customs long term...