I have a big bottle of acrylic gloss medium from my painting 101 days. I was printing some posters the other day and I was about to put down a big fat layer of speedball black, which I hate because it always looks like some chalky amateur shit to me (just my humble opinion-don't hate). So, I decided to throw in a big squirt of gloss medium hoping that would class it up--it didn't. Looked the same as always.
So, is that stuff useless for me? Has anyone tried with better results? Is there anything that one could mix in to speedball to get a glossier appearance with out having to resort to a gloss overprint?