I have read somewhere that someone did this. I believe he filled the cups with liquid plasti-dip and let them dry for quite a while. I read an ongoing discussion between the modder and bluemonkeyflyer. My recollection is that it worked but was not an improvement on the existing mods described in this thread. It also required the modder to go thru a lengthy experimentation process to equal what had already been accomplished.
3/4/14 at 9:51am