Hello Stugeorge633,
You want to take a look a Swanny's web site, he is the guru of tips and tricks and has a great section on tinting windows, here is the link to the certain tip
http://www.swannysmodels.com/Tinting.html
But I would recommend going through his entire site it is excellent.
Cheers
Thom
IPMS Member #42958 / AMPS Member #2091
IPMS Central Connecticut (President)
IPMS Northeast Military Modelers Association (Web Master)
Like Alice "I try to believe in three impossible things before breakfast"