I was always hesitant on using 1095 with the 15n20 because of heat treat differences.1084 with 15n20 are almost the same steel with the 15n20 having added nickel so it's like heat treating a common steel. The phosphoric acid and vinegar was told to me by Brad Vice so all we buy are done that way by him.I have several etching tricks i do, coffee works good to really darken the pattern after etching with a stronger acid, thats better as a 2 stage proccess, the last damascus knife in this post was etched with acid mixture, then over night in extra strong instant coffee. Sanding with high grits to knock the tops off the acid restant metals expecially on damascus. I use heated muriatic acid some times and for stainless damascus and if i want a rediciously deep etch. Just on that knife i used the formentioned method. My main goal was to get a solid forge weld. Im just getting into making my own shop made multi steels, i will be doing a lot of experiminting for sure. Im going to swap the 80crv with 1095 next time, 1080, 1084, 1095 seems to pop with the. 15n20, so i will try a combination of all those things, thanks for the suggestions. I just finished my homeade forge press thats the 1st thing ive made on it.