[ATM] Material for Tool

[Dave and Connie]

I have been looking around but have not come up with a good local source 
for Hydrostone or Hydrocal.  I have a dentist appointment at the end of the 
month so I can probably get a pointer to dental cement then (the kid's 
orodontist doesn't use it, already checked).

I have 1/2 gallon of so of boat building epoxy laying around to seal things 
so they can be made waterproof.

Here is what is easily available:
Plaster of Paris
USG #1 molding or casting paster - store wasn't sure which
Dunhams wood putty
Portland Cement - $10 / 90 pounds!
Hydraulic Cement
Sand Mix Concrete
Concrete mix - aggregate is probably too big.

Which of these are a good or bad idea?  I have found use of Plaster of 
Paris and Dunhams mentioned on the net.

Or should I just bite the bullet and get the hydrostone mail order or wait 
and talk to the dentist?

My guess is that this is a lot like boat building and beer brewing - relax, 
they all work fine.

Dave
The blank is in the mail....