Whewe... finally got enough stuff done to stop and post more to this thread. We've got Erin's 16th this week-end at our house--- Oh joy, a house full of teenagers.
So where the heck was I with this? lol
After getting the bolster fluted and sanded out, it was time to do a final sanding on the blade just to make sure it's clean. The blade should be finished to a uniform grit... but the scratch pattern doesn't have to be insanely even prior to etch. Please don't misread that as me saying finish doesn't matter. If you take the blade to 800grit, the entire thing needs to be 800grit with NO SCRATCHES coarser than 800grit. But it doesn't have to be a super uniform scratch pattern like it would if this were the final finish on a monosteel blade.
Then mask off whatever you don't want etched. In this case it was the tang and the bolster shoulder. I don't want the acid to have a chance to change those things, AT ALL... so I mask them off with pretty pretty fingernail polish. :foot:

I like the bright colors because they make it easy to see if you have everything covered. ***Just expect all kinds of weird looks and questions when people come in your shop and see the fingernail polish and tiaras in the drawer--- Um.... wait.
Into the acid- in this case Ferric Chloride dilluted with distilled water.
[video=youtube;IAJsId6_txU]http://www.youtube.com/watch?v=IAJsId6_txU&feature=plcp[/video]
This was after 3 short etches-
[video=youtube;r7mheTfZvWM]http://www.youtube.com/watch?v=r7mheTfZvWM&feature=plcp[/video]
Then I sand the oxides off with 2500X paper and a steel sanding bar.
After that, I etch my makers mark with my Marking Methods etching unit.
[video=youtube;ByXd1rYo6oQ]http://www.youtube.com/watch?v=ByXd1rYo6oQ&feature=plcp[/video]
Then I do a couple more short etches. I sand off the oxides with 3M 4000X polishing cloth (the pink stuff)
And then one last etch for just a minute.
Here's what it looked like after the final etch, but before cleaning the oxides off.