not if you have the windex, but take it some where. its messy and gluey and a pain in the ass imo. i got mine done along time ago from some jamaican for $20
i took off the tints on my last car and this car with a razor and windex and i did int scratch the window at all, so u should be fine, if u go ahead and take it to a proffesional he isgonna razor and windex that shit
Tint Removal Tip: I have a sugestion to make breathing a whole lot easier. the steps you mentiond are perfect, but instead of using ammonia, try using simple green. dilute a spray bottle 50% water and 50% simple green. spray it on the film, trap it with a plastic bag. 20 min or so in the sun even the ugliest, bubbled tint will come off. then use full simple green on the remaining adhesive left behind and bingo, steel wool (super fine) will melt the rest off. plus it smells much better than ammonia.