I made a box out of HDPE but it gets pretty sticky, so someone recommended that I put WD-40 on the box to make it easier to slide. Is that a bad Idea, if it is what do most people use to fix this problem?
i might be able to help man I used to make my own skate wax. Candles do work but all that will do is make it sticky. The best way to make wax is take some cheap ass candles and put em in an empty coke can with the top cut off, then melt all the wax down on your stove. Next take about 1/2 to 1 cup (depending on the size of the can) of vegetable or olive oil and poor it into the mix. Give it a good stir as you take it off the stove and let it sit in a fridge or something but not a freezer. I can make a batch for you if you wanna just cover shipping
try and keep the plastic as clean as possible, no leaves or dirt. like someone above me said, use dishsoap and you should be fine. also wet the plastic down every couple of runs