I didn't want to, due to concerns about voided warranty, botched disassembly, etc. but I couldn't stand the bright blue G10 on my coveted sprint run Lava anymore so I dug out the packet of black RIT dye, that I bought several months ago, and dyed them black.
I now have the perfect legal-almost-everywhere folding knife
When researching how to dye G10, I noticed a huge lack of specific instructions, so I thought I'd share what worked for me. I used 4 cups of water, one whole bag of powdered RIT dye, and a half a cup of white vinegar. I got the water boiling in a pot that my wife doesn't like, added the powder and vinegar, and let it boil for a few minutes. I lowered the heat to below boiling temperature, and dunked the G10 scales using a piece of wire. Nothing happened in the first 10 minutes or so, it stayed bright blue, but after a half hour they were deep black. The underside, where it's perfectly smooth, is now a dark navy blue, but the textured outside and the edges are deep deep black, I really like it.
Here's the tacticool black Lava next to a blue one, for comparrison:
Please don't take this as encouragement to try this yourself, small backlock knives are hard to disassemble and even harder to reassemble, without breaking anything. Add in the tiny screws and this was the most difficult folder I've ever taken apart. I took my time and didn't force anything, and thanks to the crazy-precise build quality it went back together perfectly.
I wanted to share two things that stood out when I took the G10 Lava apart: One is that the individual parts of this knife are machined perfectly. It's incredibly difficult to have several pieces of flat steel fit together with almost no detectable seem. It's even more difficult to make and fit the parts so well that they go back that way even after dis and re-assembly. I was also impressed by nice touches like the radiusing of the inside corner of the backlock, I assume because a radiused corner is less likely to crack than a 90 degree angle. Little things like this are why I keep buying (and using, daily) Spyderco knives.
Here's more pictures, my favorite pocket knife along with my favorite pocket light, both way more useful than their size might indicate (the light generates 200 real lumens on high mode, but can go 30+ hours on low mode powered by a single battery):