best way to degrease (before duracoat paint) ?

i clean the gun as i would after firing, cleaning out all the carbon and old oil and grease. depending on how bad it is , a de-greaser needs to be used to get into all the crevices. Then good old dish soap and water. i use a small and large brush to scrub the firearm. rinse and repeat the dish soap a few times until a water bead test shows no oil.
Dry with a hair drier and get it coated before it rusts. this is what i do before parkerizing a gun, so it should work well for paint.
 
A strong solvent like lacquer thinner works superbly as a degreaser. Of if you're near an autobody paint supply outlet they have gallon cans of cheap "Wax and Grease Remover" that also does an excellent job. Or you can hose it down with Brake Cleaner solvent from a spray can. All of these are highly toxic and flammable so do this outdoors or in a very well ventilated place.

Wear solvent resistant nitrile gloves for this. Two reasons, first you do not want these things on your skin for any great length of time or in any quantity. Second because by wearing the gloves you can handle the metal without leaving skin oils behind. Wipe to dry using fresh paper towels so it wipes away the oils that the solvent lifted out. Do this twice and you're ready for painting.

No need for soap and water after any of these three solvent options.
 
TSP - Tri Sodium Phosphate ... a heavy duty cleaning detergent, dissolves in water ...available at most hardware stores.... use hot or boiling water with the TSP and a clean brush, then rinse thoroughly.
 
"Simple Green", available at a number of hardware chains is bio-degradable and easy to use for de-greasing. Also has a number of uses around the home and shop. Darned good tire cleaner as well !
 
"Simple Green", available at a number of hardware chains is bio-degradable and easy to use for de-greasing. Also has a number of uses around the home and shop. Darned good tire cleaner as well !

+1 to the Simple Green. Periodically when my guns need a tear down and thorough cleaning I use Simple Green and a toothbrush. Then dry in the oven at 200C. Never failed me over the years. Learned it from the American Gunsmithing Institute series.

Plus, it smells good!
 
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