Being a tweaker, I bought two boxes of Gila USS44 20% Limo Black window tint
, a narrow/thin (cheap) squeege
and used a scissors and a box cutter to install the window tint in my 17í Casita
I did not remove the windows. The first step was to cut a pattern for each window using regular paper and then use the scissors to cut the film for each pattern. The tricky part was to coax the window tint into the proper position for the portion of the sliding window that remains behind the window screen. There seemed to be just enough "give" in the vertical screen support for me to flex it slightly so that I could get the moistened film to slide into place using the squeege. Finally, I used the box cutter to trim off any excess film.
Like Bob & Cathy, I didnít bother tinting the bath and door windows.
It didnít quite turn out to be a super picture-perfect install but itís way-more than adequate for camping.