if its just a small flurry, yes pre salting will help. but, if its a full snow storm its a waste of time and money because it will be over whelmed with snow and melt underneath doing nothing or will be shoveled or plowed into a snow bank and have to salt again. if you dump a lot in one area it may work.

Big brush attachment for weed Wacker or old fashion snow shovel to remove snow then salt after the storm is over and done shoveling. Good luck. The sooner you deal with sleet, wet snow, the less likely it'll freeze solid where you don't want it. Bigger snow storms might be easier to shovel twice, in the middle of the storm and again right after it's over.