Having recently launched a range of 3D printable stencils, we’ve had a few questions about how they can be used on curved models. The answer is TPU filament (Thermoplastic Polyurethane).
Unlike PLA, which is rigid and would break if you try to bend it, TPU is a flexible material that curves and wraps around surfaces with ease. This makes it perfect for creating reusable 3D printed stencils for miniature painting, terrain projects, or even hobby crafts.
Why TPU for Felxible Stencils?
PLA is great for most 3D prints, but when it comes to stencils, flexibility is key. TPU has several advantages:
- Bendable – conforms to round or uneven surfaces
- Durable – doesn’t snap or tear easily
- Reusable – clean it and use it again and again
- Versatile – works with both airbrushes and sponges
This flexibility lets you achieve sharper, cleaner paint patterns on curved minis, terrain pieces, and bases.
How I Made My Flexible Stencils
Here’s a quick breakdown of my process:
Step 1 – STL Files
I started with designs from my 3D Printable Palette & Stencil Set, which launched on Kickstarter. These files are created specifically for hobby use, with patterns perfect for miniature painting such as camo, tripes, decals, hazard markings, etc.
Step 2 – Slicing Settings
I opened the STL in Bambu Studio and selected a generic TPU profile. No fancy tweaks required – TPU is surprisingly easy to print.
Step 3 – Printing
I sliced the file and hit print. One important note: don’t run TPU through the AMS system on a Bambu printer. It can clog or jam the mechanism, so always load it manually.
Tips for Better Stencils
- Resize to suit – Scale your design larger or smaller depending on the model you’re working on.
- Thin it out – A thinner stencil works better for sponge dabbing and fine details.
- Secure it – Use masking tape or light adhesive spray to hold the stencil in place if you’re working on tricky surfaces.
The Finished Result
The TPU stencil bends effortlessly over curves and edges, and it delivers crisp, clean paint patterns whether you’re using an airbrush or sponge. Best of all, it’s durable enough to use again and again.
Want to Try It Yourself?
You can grab the STL files for these stencils (along with my texture palettes) on Kickstarter:
👉 Texture & Practice Palettes Vol. 1 & 2 or https://saucermenstudios.com.au/texture-palettes/
