Pre-P.S.: I meant to send this last night but I literally fell asleep on my laptop.
Thanks for your answers. I like that you're targeting each industry and doing it with a letter.
I'm going on some assumptions that would need to be verified.
a. Towing companies don't market to the public.
b. They want to be people's choice when they're stranded.
c. They would like road-side services (e.g. AAA), retail store and police business.
d. For larger towing companies they have employee drivers.
e. All their trucks have matching paint schemes.
Here's some ideas;
1. I like your overall approach. You sound professional.
2. There's no compelling reason or justification for what you're telling them and to believe your statements.
3. I think a story like the WSJ "two men" letter might be good. Something like describing a woman stranded and two tow-truck drivers arrive at the same time to help her out. One is scary, the other looks professional. Who would she choose?
e.g. It's 10pm on a dark and rainy night. A woman is sitting in her car waiting for road-side assistance to arrive. Mistakenly, two tow trucks arrive at the same time. The drivers step out of their trucks. One is wearing ripped jeans, t-shirt, dirty boots and hasn't shaved in a week. The other is wearing a clean professional uniform with your company's logo branded on his chest. His first impression says, trustworthy. The woman points to him and he gets the tow.
4. I think scaring them is a good option here.
e.g. Alternate headline: Are you scaring your customers away? Discover the hidden secrets of why stranded drivers would rather walk 10 miles at night in the rain than call your company to come get them...and how a quick and easy professional makeover can get your phone ringing off the hook.
5. Consider a bonus special report as an enticement that gives more tips on how to present a professional image to their customers.
6. Instead of attract more customers talk about get repeat business and keeping customers.
7. Try not to use "If" too much if at all. That raises doubt in the mind and could cause them to imagine a scenario you don't want them having. e.g. "If used properly..." to "When used properly..."
8. Don't ask for permission. e.g. "...then allow me to introduce..." to "...introducing..." you're the writer, you're in control, you have their attention. Just tell them.
9. "with premier," should probably be, "with the premier" although I like bad grammar strategically placed sometimes you may not have meant that.
10. Add to the guarantee, "Money-Back Guarantee on each and every order." Might as well seed in their mind they'll be making multiple orders as employees get hired. This reinforces your point that their business will grow. Look for places to say, "as your business grows."
11. Will you make just one uniform for them? If so add, "We can handle any sized order with fast turnaround time and delivery right to your offices. You can order as little as one uniform or suit-up your entire fleet. Each and every uniform carries our same 100% ... guarantee."
12. Talk about how police and even store clerks wear uniforms and they have the need for their towing services. So, they should dress as good or better as the clients they want.
13. Build-up what a uniform does for client impressions. It exudes confidence, professionalism, pride, they're in control, they're there to help, etc.
14. You also might look for ways to differentiate you from the competition.
Do you have a special process or material in creating the uniforms?
Is the patch double-stitched versus others who may only single-stitch?
Is it made with a fabric that has a cool name?
Does the fabric or stitching have a cool name like, "All our uniforms use our unique Double-X Back-Stitching that provides bonds of steel which prevents tearing. The stitches are virtually invisible giving your drivers the clean and professional look your customers expect."
15. If they have employees you can safely assume the boss has no clue what his drivers are really doing out there. Play on that fear of the unknown by pointing out that their drivers are on the road visible to the public a lot so they should look good.
16. If they have their trucks all painted the same then they should want their drivers to look as good as the trucks do with a great uniform.
That's all I can think of for now. I finished this up this morning and read the other suggestions. I think I duped gjabiz's point about showing contrasting drivers, I like his postcard idea. All great tips. Good luck and keep writing, it's looking good. Cheers.