Homebrew PCBs

Another consideration in this is the board preperation.  If I get a 
printer and find out what ink he used, I will certainly start with 
using the exact process he described.

However, this may also apply and help with ink adhesion.  When I was 
having trouble with toner transfer on one particular brand of PCB 
materail, I pre-etched it in ferric chloride.  This allowed the toner 
to bond perfectly.  No matter how much polishing I did with steel 
wools, scotch brights, 1000 grit sandpapers, and cleaning with 
acetones would help - only a pre-etch worked.

What I remember from that experience is that the material came out of 
the ferric chloride with a nice dull finish - perhaps good enough for 
the ink to adhere and dry properly.  Certainly worth a test.