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6/29/26 – My 3M Certification Experience

When I decided to go into business for myself as a subcontractor sign and graphics installer in June of 2024, one question kept coming into my mind:

What incentive does a sign shop have to hire an independent installer they’ve never worked with before?

The answer was obvious: earn 3M’s Windows, Walls, Floors & Fleet Certification. I briefly considered taking the less expensive Avery Dennison training courses offered around the country, but 3M’s global reputation and inclusion in its installer locator database made it an easy decision. In fact, I’ve received a surprising amount of out-of-town work simply because customers found me through the 3M website.

Unlike business owners who earn business degrees or graphic designers who study graphic arts, there isn’t a college degree for graphics installers. For me, this certification was the closest thing to a professional credential in our industry.

So, with nothing more than a Honda Civic, a small business loan, and a lot of determination, I booked the week-long training and testing course and flew to 3M’s headquarters in St. Paul, Minnesota, in August of 2024. It turned out to be one of the toughest work weeks of my career.

Walking into the training facility on the first day was impressive. Sitting in the shop were two stripped-down Camaros, a mock trailer with rivets, window stations, a Ford Transit front bumper, a Transit rear door cutaway, and several other practice stations. This would become our classroom for the next five days.

The week began with several hours of classroom instruction covering installation materials, environmental conditions, and—most importantly—why graphics fail. It was one of the most valuable parts of the course because so many of the problems they described were situations I had already encountered in the field.

One lesson stood out immediately: proper cleaning and surface preparation are everything. If you skip those steps, even the best materials can fail. I also asked whether full vehicle wraps should ever be installed outdoors. One instructor answered without hesitation:

“Absolutely not.”

Another highlight was finally learning the proper method for wrapping the one-inch recessed channels on cargo vans—a section that had given me trouble in the past.

After lunch (which 3M provided every day), our class of six was divided into two groups: newer installers and experienced installers. Having worked in the industry for about ten years, I was placed in the experienced group.

The hands-on portion of the week covered nine different testing stations. The Fleet certification included a Transit front bumper, Camaro side panel, box truck panel, and Transit Connect rear section. The Windows, Walls & Floors certification included textured cinder block, smooth painted wall graphics, wet and dry window graphics, and floor graphics.

For three days, our instructor walked us through every station, demonstrating proper techniques before rotating us through hands-on practice. It was surprisingly difficult to abandon some of the habits I’d developed over the previous decade, but I committed to learning the 3M methods exactly as they were taught.

Testing began on Thursday. Going into the exams, I had one strategy: prioritize quality over speed. Each station had a time limit, but exceeding it only resulted in a one-point deduction for every ten minutes over. For example, the Camaro side panel was allotted two hours, but I intentionally used nearly the full three-hour maximum to ensure every detail met the grading standards. One installer from Chicago in my group was incredibly fast and completed every station well within the time limits. Watching him work was impressive.

By Friday afternoon, I was mentally and physically exhausted. We were allowed one retake during the two-day testing period, and I used mine on the Transit front bumper. At around 4:00pm, the instructors tallied my scores, and I had passed!

The feeling was a combination of relief, pride, and accomplishment. I had bet on myself, invested thousands of dollars in my future, and it had paid off. Celebrating with two margaritas at the airport before flying home remains one of my favorite career memories.

Today, many sign shops don’t employ 3M Certified Installers—and that’s perfectly okay. Certification doesn’t automatically make someone a better installer, nor is it an excuse to charge higher prices. What it does provide is confidence. When you are a 3M Certified Installer, you’re hiring someone who has been trained and tested by some of the industry’s best instructors using standardized installation methods that are designed to maximize the longevity of graphics.

My goal has never been to advertise myself as ‘better’ than every other installer. Plenty of excellent installers aren’t 3M certified. For me, the certification represents something different: a commitment to learning the industry’s best practices and applying them on every project. When a customer hires Trinca Sign Installs, they’re hiring someone who has been professionally trained, thoroughly tested, and who takes pride in doing the job the right way for the first time.