The LP paint on Marstroms is slippery. You will need something. A friend has a great story about how he didn't need no ugly nonskid and ended up hanging onto the bridle wire when he stuffed it.

Interlux nonskid (looks like ground glass) is either what Marstrom uses or real close. You can mark the area out in masking tape then either roll on a thin layer of paint and coat the wet paint with nonskid or mix paint and non skid and roll it on.