Aerosol solvents aren’t the only way to clean a PCB, of course. Ultrasonic cleaners do a great job, and as [Steven] discovered, they’re generally safe for most components.

EMIL OTTO Etimol DFX 82 RAN and Etimol DFX 83 RSN flux removers have completed practical tests and been approved by leading ...

There’s no trade secret here—mineral spirits are a universal solvent for oil-based paint. They emit less odor than paint thinner and are considered more effective as a paint brush cleaner.