You can use 1/16 drill bits for pouring. When you are going to powder paint, stick in small 1/16" copper wire in the weedguard holes, once powder is applied immediately take out the copper wire, and hang jig on rack for baking. Copper wire can be re-used over and over. Once you are done with all your painting, put all jigs in oven, bake ,let cool and then epoxy or glue in weedguards. This is the easiest and cleanest process in my opinion. If you have more questions PM me.