Picking out your arcade machine t molding is easily one of the best parts of building or restoring a cabinet because it's where the whole thing finally starts looking like a real game. Before you pop that trim on, your project is basically just a bunch of painted plywood or MDF sitting in your garage. But the second that plastic strip snaps into place, it's like the machine finds its soul. It covers up those rough, ugly edges and gives the whole unit that classic, polished look we all remember from the dim-lit arcades of the 80s and 90s.
If you're new to this, you might think it's just a decorative strip, but it actually does a lot of the heavy lifting when it comes to durability. It protects the wood from getting chipped when people inevitably bump into it, and it keeps moisture from seeping into the edges of your boards. If you've ever seen an old cabinet where the bottom is "mushrooming" or peeling apart, it's usually because the molding failed or was never there to begin with.
Getting the Right Size for Your Build
The most important thing you've gotta do before you even look at colors is figure out the thickness of your wood. Most full-size arcade cabinets are built using 3/4-inch material, so naturally, 3/4-inch arcade machine t molding is the standard. However, don't just assume. If you're building a smaller bartop unit or using thinner plywood to save on weight, you might actually need 5/8-inch or even 1/2-inch molding.
One thing that trips people up is the "actual" thickness versus the "nominal" thickness of the wood. If you bought 3/4-inch plywood from a big-box hardware store, it might actually be slightly thinner—something like 23/32 of an inch. If you use molding that's exactly 3/4", you might have a tiny bit of "overhang" where the plastic sticks out past the wood. Some guys like that because it protects the side art, but others find it annoying. You can always trim it down with a razor blade if it bothers you, but getting a snug fit from the start is way easier.
Choosing Colors and Finishes
This is where you can really let your personality show. Back in the day, most cabinets just used flat black or maybe a dull red, but now the options are kind of insane. You've got neon greens, electric blues, chrome, and even woodgrain if you're going for that "70s basement" vibe.
If you're doing a themed build—let's say a Pac-Man tribute—you're obviously going to want that bright yellow. But if you're building a multi-game MAME cabinet, sometimes a neutral black or a sleek chrome looks best because it doesn't clash with the different games on the screen. Textured molding is also a thing; some have a leather-like grain while others are smooth and shiny. Just keep in mind that the super shiny chrome stuff shows scratches way more easily than the matte finishes do.
The Tool You Can't Skip: The Slot Cutter
You can't just glue this stuff on and hope for the best. To install arcade machine t molding properly, you need a groove (or a slot) cut right down the center of the edge of your wood. This is done with a router and a specific bit called a slot cutter.
For almost all standard T-molding, you're going to want a 1/16-inch slot cutter. It creates a thin path for the "barb" (the little T-shaped part of the molding) to bite into the wood. Setting the depth is the tricky part. You want the slot to be deep enough that the molding sits flush against the wood, but not so deep that you're weakening the edge. I always recommend testing your router depth on a scrap piece of wood first. There's nothing worse than routing your entire cabinet only to realize the slot is off-center or too shallow.
Making the Installation Easier
When your roll of molding arrives, it's probably going to be stiff and curly from being coiled up in a box. Don't try to install it right away. If it's cold, it's going to be a nightmare to work with. A pro tip is to let it sit in a warm room for a day, or even better, soak it in a bucket of warm water for a few minutes before you start. This makes the plastic way more flexible and much easier to hammer into those tight curves.
Speaking of hammers, leave your metal claw hammer in the toolbox. You want a rubber mallet for this. A metal hammer will dent the plastic or leave ugly marks on the surface of your arcade machine t molding. If you don't have a rubber mallet, you can use a block of wood as a buffer and tap on that, but a $5 mallet from the hardware store will save you a lot of headache.
Navigating Corners and Curves
The straightaways are easy—you just line it up and whack it in. The real test of your patience comes when you hit the corners. If you try to bend the molding around a sharp 90-degree corner, it's going to bunch up and look terrible.
To get around this, you have to "notch" the barb. On the underside of the molding, you'll take a pair of tin snips or a sharp utility knife and cut little V-shaped notches out of the part that goes into the wood. This lets the top of the molding bend smoothly while the barb stays tucked inside the slot. For inner curves (like on the control panel area), you might actually need to make a few straight snips in the barb so it can expand. It takes a little bit of practice, but once you get the hang of it, those corners will look factory-smooth.
Dealing with Loose Fits
Sometimes, especially if you're restoring an old cabinet where the wood has dried out or the slot has widened over the years, the molding just won't stay put. It'll pop out of the slot, which is super frustrating. If you find yourself in this spot, don't reach for the super glue just yet. Super glue is brittle and usually won't hold long-term on plastic.
Instead, a little bit of wood glue or even a thin bead of clear silicone inside the slot can help. Some people swear by putting a little bit of masking tape over the barb to make it "thicker" before hammering it in. It adds just enough friction to keep it from sliding out. If the wood is really chewed up, you might have to fill the slot with some wood filler, let it dry, and re-route the groove, but that's usually a last resort.
Finishing Touches and Maintenance
Once you've got the molding all the way around, you'll likely have a bit of a tail at the end. Use a sharp chisel or a fresh utility knife to flush-cut the end so it meets the starting point perfectly. If you did it right, the seam should be almost invisible, especially if you put it at the very bottom of the cabinet where no one is looking.
Keeping your arcade machine t molding looking good is pretty simple. A damp cloth with a little bit of mild soap is usually all you need. Avoid using harsh chemicals or solvents because they can actually strip the color or make the plastic go brittle over time. If you used chrome molding, a little bit of plastic polish can really make it pop, but for the most part, this stuff is designed to take a beating and keep on looking great.
At the end of the day, putting the trim on is the victory lap of your build. It's that final touch that turns a DIY project into a piece of furniture you're proud to have in your house. It might seem like a small detail, but when you step back and see those clean lines and that pop of color, you'll realize it was worth every bit of the effort. Happy building!