Getting Your Space Marine Armor Right
Most people treat the armor on a Space Marine model like it's just paint. It's not. The armor pieces are the structural backbone of the whole build, and if you don't get them seated right from the start, everything else falls apart. I've spent years fixing botched conversions and stripping paint off models where the armor plates were glued at the wrong angles. Let's break down what actually matters when you're working with the iconic armor. The power armor has distinct zones: the pauldrons, the chest plate, the vambraces, the greaves, and the cuirass. Each piece is molded with specific panel lines and rivet details that you need to preserve, not sand away trying to make things "smooth." I see this mistake constantly. Someone grinds down the sculpted detail hoping for a clean surface, then wonders why the armor looks flat and lifeless. The panel lines are intentional. They create shadow lines during painting that make the model read as three-dimensional even from across the room. Keep every bit of mold detail unless you're doing a specific weathered or battle-damaged conversion.
The real issue most people hit is fitment. Games Workshop armor pieces don't always align perfectly between different kit parts, especially when you're mixing Codex-accurate pieces with third-party resin or converting between chapter variants. The shoulder pads are the worst offender. The ball joint on the left and right pauldron often sits at slightly different heights on the sprue, and the underlying shoulder joint on the torso might not line up the way the pad expects. Here's what I did last month with a Blood Angel conversion. The right pauldron sat about two millimeters lower than the left once I glued it. Instead of shimming it or breaking the model apart, I took a craft knife and carefully sliced through the arm joint just below the shoulder. I popped the arm off, added a tiny bit of green stuff to raise the joint nub on the torso, and re-glued. Took about twelve minutes. The alternative would have been accepting the misalignment and hoping nobody notices, which never works out. Another thing nobody mentions enough is the weight distribution. Full Power Armor miniatures are top-heavy. The armor pieces add mass high up on the figure, and the standard plastic stands don't always compensate. If you're building a model over seventy-five millimeters tall with full armor including a bolter and heavy helmet, you should consider adding weight to the feet or using a wider base. I started doing this after three models fell over during transport and I had to dig pieces out of my bag for twenty minutes.
When it comes to assembly, use proper plastic cement, not superglue. Superglue beads up, doesn't fuse the plastic, and ruins the seam lines you'll later need to deal with during trimming. Tamiya Extra Thin or Micro Mark works fine for the smaller joints. For the larger armor connections, regular plastic cement applied with a brush gives you a real weld between pieces. The armor gaps are where beginners lose points at competitions. The spaces between the pauldron and the chest, between the greaves and the thighs, between the vambrace and the elbow. These need to be tight. Not so tight that the plastic deforms, but close enough that you can't slide a sheet of paper through. If the gap is wide, you'll need to sand the mating surfaces slightly or use green stuff to fill it. A wide gap catches light differently during painting and looks sloppy regardless of how good your paint job is. One counter-intuitive tip: don't clean your model immediately after spruing. The mold release agent on freshly cut plastic actually helps during primer adhesion if you let it sit for a few hours. Washing new parts with soapy water removes this, and then your primer tends to flake off in sheets. Just let the cut parts rest on a bench for an afternoon before you touch them with anything.
Get the Full Details
There's no single download or kit that covers all of this. What I'm describing is the practical process of assembling and preparing the armor on standard GW Space Marine kits and their equivalents. The specific techniques apply to the standard Intercessor, Assault Marine, and Terminator armor lines. If you're working with aftermarket resin, the fitment issues get worse, not better, and you'll need progressively more filler putty and careful dry fitting. The armor is the most visible part of the model and the hardest to fix once it's wrong. Take the time to check every joint before you commit glue. Dry fit everything. Check the silhouette from multiple angles. It saves you hours of reconstruction work later and makes the difference between a model that looks professional and one that looks like a first build.
