there is a flat place on the antenna where to put the vise grips or pliers definitely use a towel so you dont damage the antenna and when you put the ark one back on i suggest using some loctite so that no one can just unscrew it and steal it. i used red loctite it will probably never come off =)
Try going on the inside of the trunk and see if you can grab the antenna from the base and then turn the antenna from the outside.Did the vice grips it was just spinning in place I may have broke something gonna try the towel trick but its on there pretty dang good. Ive taken my antenna off before Its prob rust and now its dark so Ill try again in the morning.
yeah i did too and plus i was gonna let someone steal it after i spent the money and ordered it off online hahai need to go that always find myself tightening it, it comes loose note to self invest in lock tite lol