Learn easy and budget-friendly ways to create silicone molds for all your DIY projects! From gelatin molds to resin tricks, these tips will save you time, money, and hassle—no vacuum or special tools ...

[Peter Wirasnik] has been casting his own aluminum heat sinks. He’s working on capturing the heat from a car’s exhaust system and turning it into electricity, kind of like the candle generator. In the ...