they were cleaned with gasoline, then placed on outside grill and heated along with 3 containers of water.one of which held gun cold blue. then when parts were well heated and water boiling each piece was quickly swabbed with bluing and then placed in the boiling water. when all were in the water they were moved to the second container of water. then back on the grill til dry . then soaked in oil overnight . most steel will blue diffrently and may sometimes require several repeat treatments. however these pieces blued very well with one go. the heating of the parts is to dry and burn off any oil or water. this is very important.the parts were not well polished . they were sanded with random orbit sander to a matt finish.the more polished the part is the shinier it will finish.if the piece needs repeat treatments it should be rubbed down with very fine steel wool between each treatment. it may sound kind of fussy but with everything prepared the process goes quickly.