Ok, here goes...
1) Keep it simple and consistant...buy a tube formula, all the plastisol retailers carry one (about 35-40 durometer hardness)
2) I hear Fry Daddies are the least expensive way to start if you are going to dip vertically. Other options are Rite Heat or Sta Warm pots, 500-800 dollars.
3) I buy my 1/4 aluminium rod from a specialty metal dealer. 20 ft of it dirt cheap...30 bucks and you can make a lot of rods. If thats too much go to Home Depot and they usually have a bin of assorted diameter rods. If its possible thread 3/4 to 1" of the rod and use a nut on both sides to secure it to a plate...its bullet proof and most of all safe ! Nothing worse than a loose rod with hot plastic falling in your lap
4) Now this sounds too easy and after you try it you'll see why. Set your pot temp around 340 and make sure the plastisol is agitated to suspend the salt (about 10-20 % by volume is good) You can you a paint mixer on a drill, but you have to stir alot or the salt will settle and burn your plastic. 2 dips for the body and another 1 half way for the head, wait about 30 seconds between dips (longer for a thicker tube)....its that simple. You can coat the rods in a light film of worm oil or most silicone sprays, to ensure the tubes will slide off after you dip them. The hardest part to learn is how fast you remove your dipper from the pot.....slow is best, then quickly remove the dipper and turn it upright to stop the plastic from running...you'll learn this through trail and error, it's not something you'll master right off the bat.
There you go, thats all there is to it ...now get at it and show us some tubes