Applying Rhino Liner (or any bed liner) is the same as with any sort of paint application. The most important step will always be prep, period.
If you want it to stick and you want it to last long, you need to prep the surface as good as possible. What this means is scuffing up the paint you plan to apply it over the top of with a good light grit sand paper (even a
grey Scotch Brite pad works nicely).
Getting the paint nice and scuffed up is going to make the bed liner adhere to it much, much better, and it's also going to be the difference between the stuff coming off in 6 months to a year, versus lasting for years on end.
You'll spend at least a day or so on prep doing it right, at which point you can then clean the surface with something like Acetone and then get ready to paint.
Bed liner is best applied with a professional paint gun, and should be avoided in aerosol can form if possible.
For this reason, most people pay a professional shop to apply bed liner, as it's a messy and complicated process if you don't know what you're doing and have the equipment to do it right.
