I haven't really played with eye candy for awhile but drooling over version 5 LOL
some links i found but just skimming;
http://www.alienskin.com/forum/forum...ID=25&KW=glass
for the plastic, not sure exactly what you are looking for but you could use the bevel boss with different Bevel Profiles
or
use the glass filter with the opacity and fill % lowered to 0 - again change the Bevel profile will give different looks.