Make sure you can Ollie up and over the obstacle comfortably. You need to Ollie up then slight shifty to get into the smith. The key for sliding here is to keep your weight back. You are sticking because your weight is too forward or even maybe too centered. Keep practicing to figure out the right amount of weight distribution but remember more weight to the back! GL

Try waxing the rail more

Shouldnt stick at all on pipe coping. If you are, youre going way too slow

Faster!