I think if you have a shop that pretty much does quite an array of work, your competitors will look at you as kind of like a warehouse. For over 30 years, our competitors, large and small, call on us for things which they either ran out of or didn't have in stock. It's easy to see through their little white lies, but we have several people who will call and say..... I have 3 sheets of Cor-X and need to cut it. Can I use your equipment ?? Yep. Hey, I need 7' of black vinyl, can I get some ?? Sure. Can you print this up for me later today, I ran into a jam. Not a problem.
Over the same 30 years I asked maybe 3 or 4 times for something I was out of and no one could ever help me. I've never asked for a cent, so I've never been paid for the helpfulness. One time a guy left a 10 spot and said treat everyone to lunch. There are 4 of us full time.
Had a competitor some years ago ask if we would hire his son so he could learn the ropes to become a sign guy. Why don't you, I asked him ?? Oh, I can't afford to pay him and he needs the money. Wha...... ??!!??
Like mentioned, treat us fairly and we'll return the favor. It's been kinda downhill the last few years. No one, including the distributors have anything in stock anymore, so sometimes you are faced with a problem of being outta stock and no place to turn, except your competition.