has anyone used this in firearms? ( https://www.amazon.com/gp/product/B009EC4Q3W/ref=pe_3676590_803013790_em_1p_0_lm ) I have 3 questions about it if you have used it in a firearm. Q#1) does it work well? Q#@) is is safe for regular gun steel, as well as stainless steel? and Q#3) is related to #2, will guns that regularly see 62,000 - 65,000 psi of pressure (5.56 nato , 300 win mag,) be negatively effected by repetitive use of it? I KNOW that very few of the members here are metallurgists, let alone one that specializes in ballistic steel. I am just looking for real world experience with the use of it. and yes, i have sent a question to the maker of it.