TSI Wax Pen The TSI wax pen was marketed back in the 1970s by
Technical Specialties International of Seattle (not to be confused
with the trucking company of the same name) but it was made for them
by HYTRONIC (not to be confused with a dozen unrelated companies). I
actually saw one offered for sale a year ago, with instructions,
under the HYTRONIC brand name!
Maybe if you contact the seller, they may still have it and its
manual? Who knows.
You could also follow up THIS 2006 seller from ganoksin:
Mark
Relativity PL