I had a little experience with the grills after my oem grill was stolen. On the OEM grill it looked like the BowTie was formed with the plastic and then injected with the gold tone. I guess they did it like that to keep it from ever falling off. When I went to buy a new grill, I went cheapo and got a reproduction grill. I had to buy the BowTie seperate and glue it myself. It fell off about a million times. I tried everything to get it on there, but nothing seemed to work. I looked at other Blazers (people probably wondered why I was snoopin around those trucks in parkin lots) and the OEM grill has no way (that I can see) of letting that BowTie off. Eventually I gave up and pulled an OEM grill at a junkyard.
It's weird, there seems to be no other difference between the OEM grills and the Repro grills other than the BowTie.
Edit:
I seem to remember that drip on my original bowtie as well. The repro one was nice, but after gluing it (with emblem glue nonetheless) you could see the glue marks through the gold paint. Just walked out and looked at the one I got now (took it off a 'burban) and it looks fine.
Al