This guide breaks down the four most common CNC prototype materials — ABS, aluminum alloy, acrylic, and PC — covering what each one is built for, which surface finishes it supports, how it affects cost and lead time, and when to mix materials on a single build. Whether you're running a functional test, presenting to stakeholders, or verifying fit and assembly, this guide helps you make the right call the first time.

Looking for a prototype that resembles metal without the cost and lead time of painting? Silk PLA has become a popular choice for appearance models, product presentations, and concept validation. In this article, we share real-world insights into how Silk PLA creates a premium metallic look straight from the printer, where it works best, and how designers can use it to accelerate product development while reducing prototyping costs.

Discover the best prototyping methods for robotics startups, including CNC machining, SLA 3D printing, SLS nylon printing, vacuum casting, and low-volume manufacturing solutions for robot development.

Multi-cavity vacuum casting lets you produce multiple parts in a single pour using one silicone mold — cutting unit cost by 30–50% and delivering batches in 1–2 days. Ideal for 50–500 piece trial runs, it outperforms single-cavity casting in efficiency and consistency without the lead time or expense of steel tooling. This guide covers the four-stage workflow, mold design rules, PU material options, and a side-by-side comparison with 3D printing and CNC to help you choose the