Finally achieved the perfect etch/patina for what I'm wanting for my BK9 project!

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Dec 5, 2009
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First pics!

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So, this knife has been through several incarnations since I bought it. First it was stripped and had a really cool multi layer patina on it with some wicked depth and stippled stock scales. Then I sanded that all off and hand sanded the blade to 800 grit trying to remove as much of those tooling marks as I could. Loved the ultra smooth hand finish...still rocking the stippled scales but trying to decide on something different.

Well, I finally finished a few other way over due projects and pulled this guy out to get back into it...in preparation, I've been rereading through every thread on customizing I could get my hands on....sadly, older threads are sans pictures :(. Anyway...first thing's first, I deramped the blade and ground the clip transition into a more graceful curve, like a drop point. I dremel'ed in a shallow choil and ground off the skull crusher extension. Next is the foreguard, it's getting flattened and the handle curvature is getting profiled a little different. Now on to the finish.

I've seen some really cool acid etched forge marks on the flats of knives and decided I'd start with that. So I made my pattern in paint, let it dry then went over it with fingernail polish. Then into ferric chloride/vinegar mix for about an hour. First thing I noticed was the acid had eat through the resist along spots on the bevels. Scrubbing it all off actually revealed some neat character as well as the rough forge finish I was going for. Awesome. Next I thought I'd try different variations of a patina...but couldn't get anything to do exactly what I wanted...what I wound up doing was lightly darkening the steel which was fine. So I decided I'd try and apply some straight yellow mustard along the edge similar to how clay is laid on before doing the quench. I let the mustard sit for an hour and a half and scrubbed it off. Wow...this is exactly the look I was going for!! The blade has a killer forged look as well as this wicked San Mai laminated steel look due to the mustard etch.

Next up is the handle...I have some nice, old, quilted black walnut on white G10 liners that I'm going to work with tomorrow...probably use some thick hammered copper pins to accent with. Whatcha think??
 
one of the nicest looking patinas I've seen. Well done. Do you have a pics of the paint/fingernail polish/ferric chloride/vinegar process?
 
Great looking 9, the patina is awesome, good job on the other little touches too.
Looking forward for to pics of it completed with it new handles, should be good.
 
That is a fantastic looking mod/etch/patina. Photo'd on a blueberry bush to boot, it looks like.
Thanks! Boxwood actually, it would be awesome to have a row of blueberry bushes outside of my work instead of these stinkin things!

one of the nicest looking patinas I've seen. Well done. Do you have a pics of the paint/fingernail polish/ferric chloride/vinegar process?
Thanks! No, I didn't think to grab any pics of the main process. For the forge marks, I took an artist sponge and just dabbed on paint to use as a resist making sure to leave plenty of open places for the acid to work. The fingernail polish was supposed to be an extra layer of protection over the paint on the bevels but I think it cut the paint and left thin spots. My main concern when acid etching is the edge, I always try to goop as much resist along the edge line as possible. There are a couple small spots that got into the edge but I think they'll sharpen out in the end.

Very nice; looks like a lot of work - but worth it!
Thanks! More time consuming than anything really. Especially with trying the different things used for patinas. I get impatient and sometimes I can't let things sit as long as they should lol.

Great looking 9, the patina is awesome, good job on the other little touches too.
Looking forward for to pics of it completed with it new handles, should be good.
Thanks! I'm looking forward to it as well. It's been a long time project...I've had this thing for a few years now lol. I'm very picky though and it takes me a lot of looking up what other people have done to give me inspiration on what I want to do before I finally make a decision. Even then I 2nd guess myself through the process. I'm going to start on the handle shaping today.
 
Thanks guys! Didn't get to do any handle work today, got company coming in so I was put on house work duty :P lol. I got sunday though!
 
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