I keep trying slightly different routines with the ATP-641 with some spectacular failures, a couple times it would have been better not to have used it. Never did find any real instructions but there are days I am Google impaired so something may be out there. 1) The steel must be clean enough you would use it for surgery 2) Was the heat gun and warming the steel up to the point I could not hold it plus a little. 3) Stir the compound for a couple of minutes so it is very well mixed 4) dip the blade into the compound then hang to dry. 5) Subsequent coats can be applied with brush so they are nice and thin, heat the blade very well before each application. Top blade (T1 steel) was dipped twice and ATP blew off in furnace even with a preheat cycle of 100F then 250F for 15 minutes before ramping up to 1500F then 2275F. When dipped blade was room temperature both times with three days between coats. You will notice the top blade has spent some time on the belt sander, took ten minutes to get the decarb cleaned to this point and some still remains. Crack like lines are were the ATP failed and surface was damaged from exposure to the atmosphere. at about Rockwell 64-65 this little guy should be an adventure each time it needs sharpening, the chisels I don't mind as they will see a hone and compound primarily but a knife may be less fun. Lower blade 1084 that was dipped then remaining layers brushed on with a foam brush with lots of heat before each layer. All the compound fell off or brushed off easily and the surface even in the black areas is still at the 400 grit level and with any luck the extra five layers on the spine formed a nice hamon.