Tony,

I had to do this too. Here's what I did.
1. Spray bottle full of soapy water
2.  plenty of sharp razor blades
3.  no alcohol!!! ( rubbing or drinking:(

Angle razor blades to fit between the lines, scrape carefully.
The tint did'nt stick to the lines just to the glass,
then put the blades parallel to the lines and push to the lines softly then
peel that strip up.

It took me 2 hours so be patint and use plenty of soap and water and dont let
the old tint dry on anything that it falls on, it will stick to it just like
the window did.

kurt thomas
87 syncro