Smooth-On has a product called Mold Star, I use Mold Star 15. It's easy to mix half & half and no air bubbles without using a decompressor. Use PVC pipe for as many mold containers as possible. You can buy an 8' stick at plumbing supplies and cut it with a hack saw. Save the PVC container to store the mold, helps keep it's shape. Also, allows for thin wall molds. The object you are making the mold of (positive), be sure to clean it good to remove greese, oil, etc. Spray the object with a couple of coats of Rust-Oleum or Krylon clear. Spray with mold release before pouring your mold. Smooth-On has mold release in pint or quart cans, use a spray bottle rather than aresol. Less expensive. Use Plexa-Glass from Lowe's or Home Depot to make mold boxes. You can make an adjustable box using internet plans. So much to learn, the only way you are going to get is to do it. Another biggie is knowing where to cut your mold to remove your candle. Two (2) piece molds is something you will soon figure out to make. Smooth-On has some great classes if you are close to a distributor. Martha Stewart has a good video on making molds. Good luck, you will enjoy, silicone is expensive - look at Urethane for less detailed molds. I am just rambling as thoughts come to me, Best - J.Snow