Depends on whether you want it black or not.
If you don't mind, take something like a beer can and cut the bottom off it. Punch some holes through the hollowed base and pile the resin in that. Put some kind of catch container underneath the beer can and then set fire to the resin. It burns but it melts too, and it drips through clean without the muck in it.
HWMBLT makes me the most beautiful clear amber coloured resin though by dissolving it first in something like real turpentine and straining out the debris, then evaporating off the turps.
The house smells wonderful while he's doing it
I dissolved the resin in warm olive oil (it needs broken up, so keep a wee stick to hand to gently pound it in the jar) and then strain it out that way. Again it's clean, but the oil resin mix isn't solid unless I reheat with beeswax. It makes great furniture polish or portective coating for wooden handles, etc.,
I have a big pot of resin to be cleaned up; interested to hear how other folks do it
cheers,
Toddy