What type and where do you get your citrus solvent? I'm assuming you aren't talking about the citrus based wood stripping products.
Also, welcome back.
Thanks! Here's where I get my citrus solvent and PTO: http://www.realmilkpaint.com/
Their PTO lends something of a darkish honey-colored finish to walnut stocks; put more on, it'll get darker. But if you want to go darker faster, try their dark tung oil, which has more of a brownish tint to it; lately, I've been using dark PTO on an exclusive basis. After a cleaning with plain citrus solvent, I mix up either the PTO or dark PTO with citrus solvent, usually 50:50, and apply the mix to the stock in several coats. 8 oz. of either PTO or dark PTO will last you a long time - easily half a dozen dried-out stocks or more - but don't skimp on the citrus solvent. I ordered 32 oz the first time, and ran out fairly quickly, and am now about 1/4 of the way through a gallon. It's a bit pricey, but IMHO well worth it, and your gun room will have a pleasant citrusy smell once you're done