Originally Posted by boogieohms
...i like to do everything myself.. ie, make my own... canvas...
You make your own canvas? How big's your loom?
Anyway, is there a way to make your own cheap dryer medium? Quick answer is yep, sure is. Do you have any philosophical problem with toxicity or health issues?
Longer answer: 4-6 hours with true oil paints is asking too much I'm afraid, not consistently at least.
Drying time is dependant on the nature of the original pigment(s), the type of oil used as a binder, how thickly you're painting, temperature and humidity, your support and its preparation and maybe some other factors so to get this kind of drying time as it is would be tricky (and would be very risky to the painting) and across the board is just not feasible.
If you paint thinly on a fairly absorbent ground, using lean paints and minimal medium, and prefer colours made from pigments that naturally make faster-drying oil paints you'll get pretty good drying speeds already without having to resort to added driers of any kind. If you want to include modern synthetic organic colours or traditional oily paints like Lamp Black, which don't dry quickly by themselves, glaze with much body or paint at all thickly and you want short drying times then oil paint is not the medium to be using.
Some people are just going to suggest you try alkyd medium, alkyds instead of true oil paints, or maybe even Genesis heat-set paints where you 'dry' them at will with a heat gun.