There isn't any "duracoat engine paint". There is Duracoat, then there is Duplicolor (or other) engine paint.
A torn down AK fits nicely into a household oven And GunKoat flavored Meatloaf is probably my favorite meal
In any case... if looking for a good paint job? I would suggest paying that man $75 for an AL blast and GunKoat job... you'll be happier with it