Surface Defects, Rust, and Finish Preparation
A clean-looking surface is not automatically ready for a finish or a fastener. A burr can keep two parts from seating. Rust can hide damage. A coarse scratch pattern can show through paint. The next operation tells you how far preparation must go. Good shop judgment has a sequence: notice the condition, decide what the […]
Material Properties: Hardness, Toughness, and More
Property questions can sound abstract until you connect each word to a physical result. Ask what the material is being asked to do: resist a scratch, bend into a new shape, survive a blow, or stretch into wire. Small differences decide this kind of question. Once you spot resistance to scratching, impact, bending, stretching, or […]
