I usually use Goof Off, but it also takes the oil off your hands. MEK is fine as long as youre in a well ventilated area. TRICH was the stufff to use WAAaaay back inthe day inthe Air Force. It would peel the chome off a bumper.
If its enamled onto the bottle, try wet sanding it with a fine auotmotive grade paper.
SkyDrol. Its some nasty stuff. i work with it EVERYDAY... The best way to describe the stuff is, its color is brownish purple,. smells like a bad bottle of Pine Sol, it doenst initailly bunr the skin, unitl your pores opne, then youcant get it out. Hot showers make it wors, and dont EVER touch your junk after working with it. Get it in your eyes, it will burn the membranes off the eyeball., it can cause chemical 2nd degree burns, and the fluid can be at less than room tempreture. And the best part is.. its an Esther Phosphate.... Greeeaaatt...
Basically, remmeber the partin Alien... when they tried to peel that facehugger off that dude, and they found out it had acid for blood?... SkyDrol is like that....