i used 6 194 6 bulb leds with 6 adaptors, i've had problems with the metal peice falling out of the plastic adaptor and the bulb fell into the cluster. idk how finger nail polish worked for yall, i tried it and it didn't do anything but make them brittle (i did infact use acetone free) i used my knife and scraped the back side clean then frosted them. needles are easy to remove just becareful you get them on back right.