Ya didn't miss a thing Strong. What yer talking about is "trueing"(sp)the fat. After ya cook the fat down (real slow n easy like)and strain off all the solids,let it set up n get solid. Then break it into chunks n put in a good sized pot and cover it with water by about an inch over the fat. Bring it to a low boil for about 1/2 an hour or(give it a stir now n again) so until everything is really melted, then set it off to the side to set up again(outside if its cold n the fridge if its not). Once it is hard, slide the fat off the top of the water. The underside of the fat will be sort of slimey n gritty, scrape this junk off and toss it, put the fat back in the pot(clean the pot first) with new water and do it again. After it sets up the second time around and ya scrape the bottom it ought to be nice n white in color and more waxy feeling then slick like grease.This then is clean "trued" fat.What ya have done is remove all the junk from the fat that ya really can't see, there will also be crud in the bottom of the pot of water that has settled out of the fat as it boiled, thats why ya clean the pot n use a fresh bacth of water each time ya boil it. It ought to keep for ages without going bad on ya and ya can mix it with whatever ya want for patch lube, leather dressing or whatever.Hope this helps some YMHS Birdman