the testor's red seems to work very well... i was impressed with how well it held up on my taillights (until i got my tyc's)
The "transparent black window tint" however, i was not impressed with at all... it doesn't seem to bond well, no matter how good your prep is. I used it on my Sidemarkers
, and it flaked off within a month... so, i figured, i did something wrong in the prep (everyone makes mistakes) so i prepped them again, and painted them again. I even used an adhesion promoter this time. Again, it flaked off within a month. I won't be using it again.