I haven't tried it yet, but I see some beeswax/tallow blend candles for sale on Etsy. I will try making some container candles with my old lard and candle scrap, starting with a 50/50 blend, and I'll report back.
I have lard left over from buying a half hog a few years ago, and I'm getting another half hog in a few weeks, so I have to make pantry room for rendering my fresh lard. I think the message here is that I need to step up my dietary consumption of lard.
I'm almost out of scrap candle, almost out of containers (without getting into the canning jars), and still have 3 pints of lard. But I'm happy so far with the process. These harden about like you'd think they would, harder than lard but softer than most container candles. I'm not weighing the lard and wax anymore, since I don't know what's in the candle scraps anyway, but just eyeballing an approximately half and half mix.