Hello,
I've actually started lacquering some pens as a hobby. I'm well into making two of them right now, one in chinkin and the other one maki-e over tamenuri, and I'm currently planning another using chinkin and the ishime kanshitsu process
Honestly, it isnt an easy process to use urushi in a small scale operation. I've spent quite a sum finding all the supplies, especially since i'm not one to settle for anything less than the best. I've found all of one place in the united states that stocks urushi, and i swear i read somewhere that there is a governmental ban on the import of urushi in large quantities.
Also, if youre allergic at all to poison ivy/oak/sumac, it would be wise not to use the material at all because urushi is the sap from a tree from the same genus as those three noxious plants, and the chemical that causes the rash is Urushiol which is the very same substance, in conjunction with a natural catalyst and humidity, that causes the lacquer to cure to a hard finish. (Luckily it seems that i've become immune to the urushiol (if thats at all possible) i've never gotten severe rashes from poison ivy, just minor itching, and now, i dont even get that anymore.)
You could very much use other materials for the lacquering and painting process (I also vaguely remember seeing a russian lacquer painted pen on this forum some time ago...or was it on stylophiles...). The second best material after true urushi would be cashew lacquer. Cashew lacquer is much more readily available and far cheaper. Its the most chemically similar to urushi, being is derived from the toxic outer "shell" of the cashew nut, a distant relative of the lacquer tree. The benefit of this lacquer is that it is of similar appearance and strength to urushi from the Toxicodendron vernicifluum tree. Also, cashew lacquer comes in a far greater variety of color and the transparent version is much more transparent than true urushi.
However, the same as hon-urushi, cashew needs humidity to cure. Speaking from experience, if you dont have a suitable curing cabinet (aka urushi furo) it can take months to dry if does at all. I've adapted an old cigar humidor with a humidor humidifier with a variable relative humidity settings for the process and i've managed to get the curing to 6-12 hours until dry to the touch.
I'm certainly not trying to deter you from using the urushi or cashew, as those are indeed the best materials to use, and i've yet to find any material that you can use (other than catalyzing urethane...car paint...which needs to be sprayed and has toxic fumes) that comes near the durability of urushi.
Yet there IS hope. Japanning has been around since the 1700s and unlike true lacquerware, it was developed by europeans as a cheaper substitute for importing real lacquerware. It uses various much more readily available materials, which is also far less noxious. It is this japanning process that developed into the decoupage process.
Japanning uses materials such as shellac (traditional wood finish, esp. violins and guitars) Copal (semifossilized amber), drying oils (oil paint binder i.e. linseed, poppyseed, walnut) and more recently, synthetic resins such as polyurethane (wood finish), acrylic and alkyd (paint binders, sign paints, and "enamels") Any of these materials can be used as a glossing medium and binder for japanning techniques effectively.
Feel free to private message me if you want more information. Since I'm well experienced with woodworking, fine art painting, and have given much thought to various alternatives to urushi, there is a lot more information i can give you that i havent written here, and i can probably answer most of your questions.
Acrylic model paints and "lacquers" (Testors)
Drying oils such as linseed oil, of which stand oil provides the toughest finish (Windsor & Newton, Maimeri, Sennelier...etc)
Painting resins and varnishes including copal (see above for brands)
Alkyd paints and Mediums (Windsor & Newton Brandname Liquin)
Shellac (Various brands...preferably bought in dry flakes and dissolved just before use)
Metallic Pigments (Jacquard Pearl-Ex Pigments)
Powdered Pigments (Gamblin, Sinopia....etc)
Wikipedia on JapanningUrushi-Kobo: Information on Urushi and the Lacquer ProcessDick Blick: Most of the Japanning supplies i mentioned can be found hereCashew Lacquer Source