Freshman, yes, it is OK to wax a signature-stone's bikini area in European letter-sealing style. You can see a metal one in the movie "Elizabeth"-- it is looking like a candlestick.

JMCC, it is not hard of making one onesself. Let's carving one with me! Only 100-yen of cutter knife and old toothbrush and mirror is needed. Stones are about $2~5 at most decent stationery stores in Asia.

here is photos of some new ones making last week.