I don't know about expiration date either, I used mine 2 years ago, got rid of the road chips on my hood, rear arch flares and front bumper. Also made scratches on my doors disappear. I found that if its a big chip (the size of your pinky nail or bigger) the paint won't stick very well, if at all.
If you have to do an area with a shitload of chips like your bumper, doing each chip one by one isn't gonna cut it. So dipping the tip of a rolled up paper towel in the paint and smearing it over a large area works too and it's faster.
There's a thread on here with my before and after pictures, I can't for the life of me find these pictures right now but if I do I'll post them.
Originally Posted by JINT
Some people have serious track experience from the cruise, so what is fast to you, isn't fast to them.