Brad,
I have used several products. I will try and give you the low down on each, and then you can judge for yourself.
I used Tarminator about a week ago to try and remove some bug resiude and a few tar spots from my front bumper. I had heard very good things about the product. However, I personally was not thrilled with the results.
I sprayed a light coat of Tarminator on the bumper, then waited at least 5 to 6 minutes to allow the solvent to work. I then wiped off with a micro-fiber towel. The tar and bugs were very hard to remove. I then applied a second coat, waited, and applied another thin coat just before I wiped. Still, bug and tar resiude remained.
I then tried Blue Magic Bug and Tar remover. Now, I know that this is probably not a "high-end" product. I planned to use the Auto Int ABC product the next day, and apply a coat of AIO, so I was not extremely worried about leaving the Blue Magic residue on the car for very long.
Blue Magic is a thick blue gel. I applied it again with a micro-fiber towel. Wiped it on, let it set for about 2 minutes. Wiped off, all the bug residue and tar was removed. The surface was smooth, and slick. I am sure the chemicals are stronger, and you may not be interested, but I found it to work better than Tarminator.
I have tried Xenit on some tar spots on the inside wheel wells. Xenit worked well on these tar balls, the spots came right off the wells. I am not sure why it worked better than Tarminator. Both products have a strong citrus smell. I really think Tarminator may be a "watered down" version of Xenit. Xenit works, but has a warning on the label that it is a strong solvent and to avoid using on certain plastics, to spot test it etc. So again, not sure if you want to use this on your paint or not.
I hope this helps Brad. Man, normally you are the fellow recommending products! I am glad I can return the favor.
SJ