Wheel weights, do you use the Zinc ones too?

I have a bucket of weights that I got from a local tire shop and I have separated them into Lead, Zinc and Steel piles. I have read you don't want to mix the lead and zinc when melting them down as they have different melting temperatures but this was all in the context of casting bullets not decoy weights.

Should I just keep the lead separate from the zinc or mix them all together?

Making J weights too.

thanks,
Andrew

I'd keep them separate in case you wanted to use the lead later for bullets. If that'll never, Never happen, then it doesn't matter.