I'm new to PCB making for prototyping... I have some old copper clad stock, but its oxidized (salmon color on some and dull finish on others). waht's the best way of removing the oxidation? I read on your blog about using a mouling sanding block. is this similar to what you use for sanding sheetrock? Can you give me a specific example or what grit spec? how about a chemical process like using muriatic acid? which gives the best result (mechanical/abrasive or chemical)?
Thanks,
Rick