Regarding this, can you paint over truck bed coating?
Truck bed coatings can be painted. Try to apply the paint within 24 hours of the truck bed coating becoming dry to the touch. If you've waited longer than 24 hours to paint the truck bed, remember to clean the surface before applying the paint.
Consequently, how long does rustoleum bed liner last?
Well the Rustoleum only lasted a day. I used four cans on the rock sliders. I would coat them real good then let them set for 24 hrs or more then recoat (took 3 days). Then I let them cure for about 4 days in a room at 70 degrees.
So, as a general rule of thumb, one gallon should be sufficient for a 6-foot pickup bed. Purchase and additional 1-2 quarts for an 8-foot bed.