Here's a true story that was written today by an 'Old School' Signwriter friend, John Long. It really brings back grand memories for me. 
My  dad taught me almost everything he knew about the 
sign business. I  learned more from working with other 
sign painters and then expanded my  overall knowledge of the business after vinyl came into popularity. When  I turned 18, I was literally "traded" like a baseball player to work at  a large electric shop so that I could learn all about neon, plexiglass,  metal working, sheet metal fabrication, channel letter manufacturing,  welding, etc.
 A few weeks ago I was asked if I still had the  basic union test for journeyman 
sign painters or had any of the  information that my dad used to train his apprentices. While I can't  find the "test" yet, I do have a lot of dad's writings on the different  aspects of proper 
sign painting, building, installing, etc.
  Although I don't have the paperwork "in hand", I do know that he had  some sort of written syllabus on which subjects to cover and at what  time in the apprentices' training to introduce each aspect of the trade.  I can offer this however... my memory (for what it's worth). So here  goes...
 The typical apprenticeship was designed to last about 6 years and then you received your journey level test.
  For me it started with cleaning the shop. Floor sweeping, tool  organizing, and then I learned the proper care and maintenance of  brushes. (cleaning wasn't just for me to keep busy and clean the shop,  it literally helped familiarize me with all the tools and brushes). I  also learned shop safety at this time, fire hazards etc.
 Once I  had mastered the fine art of cleaning brushes, I was able to move on to  actual lettering... but just strokes. Basic stuff that almost any  lettering book shows you at first. Verticals, horizontals, diagonals and  curves. Then you move on to piecing those together to make letters and  practice lettering the same letter over and over. I can remember  lettering over 100 "S's" before I got a "Hey, you got the hang of it!  I'm proud of you! Now let's try some basic words." If this were a  "normal" instruction of an apprentice I would imagine this would be the  time they taught proper use of a mahl stick, but my dad had this thing  against them. In hindsight I wish I had learned with one.
 For  words, I jumped back and forth from a lettering quill and paint to a  Speedball pen and ink on 
paper. During this time I was learning about  the different materials used to make 
signs.
 The next step was pin  striping, scroll work and borders. For the pinstripe lesson all I did  was stripe straight lines about a 1/4 inch apart on our sliding glass  patio doors until they looked consistent. We didn't do a lot of fancy  pin striping on cars, but we had to learn it because it does come in  handy for fine 
 borders, etc.
 Then I moved on to what we used  to call the "basic alphabets", Gothic, Roman, Script, and tried to  master lettering those by building up the letters with the appropriate  size brush. Next came the casual lettering. During that time he also  covered letter spacing, line spacing, margins, and rules about how many  different colors and or letter styles are appropriate for a good looking  layout, etc.
 Then I graduated to single stroke lettering (one  stroke as some call it) and I also learned the rules for thick and thin  strokes and script, like never placing script on an arc.
 Then we covered layouts, thumbnail sketches and color theory, your basic color wheel stuff.
  Then I moved on to wood 
signs which involves gluing up slabs, routing,  the very basics of hand carved letters, and sandblasted 
signs.
  Then pattern making with a wheel and Electro-pounce. I also learned  truck lettering, window lettering, and the basics of gilding.
 Then I learned the finer points of surface gilding, glass gilding basics, and truck gilding.
  Next was show cards and screen printing techniques. Just the very  basics of screen printing though, because at that time you could order  screen printed 
signs so cheap you would be crazy to do them in-house.
  Then wall 
signs from a grid and patterns, billboards and  mural/pictorial painting. (I did wall 
signs before gilding, but not by  myself)
 I think if a person masters each aspect, to the best of  their ability, and in this basic order, then they would have a much  easier time learning this trade.
 The craziest part about my  personal story with my dad is that he started me at the ripe old age of  11 and I was a journey level 
sign painter before the age of 16. I was  actually being driven to jobs, dropped off and completing the entire  
sign job by myself and then calling my dad to come pick me up and  collect the check because I wasn't old enough to drive. After I turned  14, we got so busy that I was going to school and also working a 40+  hour week just to keep the 
signs going out the door.
 Sometimes I  tell my story to people and I can see disbelief in their eyes, and I  totally get it because sometimes I look back and can't believe I was  able to accomplish all that at that young age either. Except for this  one thing.... My dad was a truly exceptional man. He kept pushing me,  and pulling me along with so many words of encouragement, even though at  times they seemed harsh, they were always just what I needed at the  time. But I wasn't the only man he trained. There are at least five  other men out there that owe their entire career and livelihood to my  dad as well.