I have had a total of four guns electroless nickel plated, the first two were done in '93, still have two of them. I stripped the receivers and made plugs for the ends of the bores with a threaded rod thru the bore holding them in place. On these I had washers made of "nylatron" to keep the 180 deg F solution out of the bore. I still have these plug and rod setups. Before dipping, they were lightly beadblasted to remove the bluing. It's a great way to make a blue action look "stainless" when installing a stainless barrel. The nickel has a slight yellowish tinge to it and can be differentiated from stainless. The 300 Win 700 BDL that I had plated was carried on at least 10 one week long elk hunting trips and hauled around on many other trips. Where it was rubbed hard, like on the barrel inside a soft case while bungeed on a quad rack it would get shiney spots but it would never rub off. Very durable stuff. "As plated" it has a Rockwell hardness of about 40 Rc...after application it can be heat-treated to about 60 Rc. Mine were never heat-treated. Great stuff.