repair - How (not) to treat the surface of a precision ruler

I made the mistake of leaving my Starrett ruler in a damp, cold workshop and develop a small patch of rust. To compound this mistake, I decided to dip it in rust-remover. As you can see, I turned my

Restoring a Starrett 12 ruler

How to Use a Vernier Caliper: Tips for Measuring and Reading

Process Capability Analysis Cross Precision Measurement

L Shape Square 500mm 18 inch Metric Double Scale Aluminum Right Angle Ruler Measuring Layout Tool with Level Bubble | Harfington

China Precision Granite Surface Plate factory and manufacturers

The Best Combination Square

Measuring precision - FineWoodworking

Microscope Stage Micrometer, Calibration Film Ruler, Circle Size Estimation Measurement Chart

General Tools 301/1 Ruler, 1/4 x 6, Polished Stainless Steel

6 Machinist's Ruler - MPR6