RE: where to buy fiberglass materials near San Bernardino
I think the Partall #10 jug used to be made to north of Los Angeles. I goy it via Riverside store. I used to work up street off of University near to the black box county building. So was easy and handy for me to visit during lunch hour. The whole firm was pretty well comitted over to water beds at the time, instead of what I was in to. I think at the time, S&W Plastics had like 12 stores open. The Ontario WH was NEVER open for the public.
The parting stuff you got may be too thick. Hastings out of Colton used to make the stuff for them, and it was only available in some aerosol can. That same can put the wax on too thick, made lumps and bumps in the surface, so then got a $7 can of the Meguirs at Riverside store and did as their fiberglassing poop sheet said to. You may need a piece of Cheesecloth and a can of Meguirs now.
I used cheap and easy Flowquil (their $1 special colors too) to seal up the pores in the boat hulls, made of Plaster of Paris, then 4,5,6, layers of wax. The casting mix-up took like 1/2 hour out in the lawn area, then pour and walk away, for you are done then. All this took 1/2 hour per day for preparation, BEFORE I could make my first casting. I know, I know, come home from work, lay up the moulds and then go inside the hosue.