Years ago, I spray painted a bunch of my tools a hot pink! They never got "borrowed" in the shop again....
I've been painting mine pink for years. For some reason, the other carpenters in the shop stopped borrowing them... and when one DID go walkabout, it was easy to spot the pink from across the shop. Then I write my name in marker on the paint, so if someone picks up a random tool, they know who to return it to.
I've engraved most of them too. At least there is a
chance of getting them back. No chance at all if not marked. And if you do find one in a coworkers hand, the engraving is undeniable.
As far as the OCD stuff goes, I mask and paint them neatly. I found that the guys that randomly splash whatever paint is around on their entire tool bag usually use one of 2 colors (neon green or orange) and the randomness ends up almost like camo in that it makes it harder to spot the tool.
I buy engraved, and prefer engraved to the butchery some do, like making notches in the edge of wrenches with a grinder. Engravings I just grind and polish. I haven't found a paint yet that will stand up to every solvent, so I just clean other peoples paint off after I buy them. I buy at yard, garage, and estate sales.
For me, tools are a means to an end, not fetish items or totems. Functional, clean, good value for the money. That's what I'm looking for.
zuk