Most beginners ruin paintwork before they even pick up a polisher. Here are the 5 mistakes I see constantly:

1. Skipping the decontamination stage. If you're machine polishing over bonded contaminants, you're grinding them into the clear coat. Always clay bar or use iron fallout remover first.

2. Wrong pad + compound combo. A cutting compound on a finishing pad does nothing. A heavy cut pad with a light polish is aggressive but leaves haze. Match the severity of the defect to the right combo.

3. Working in direct sunlight. Panels get hot, product flashes off before you can work it, and you can't see the defects properly. Work in shade or a garage — always.

4. Not doing a test spot. Every car's clear coat is different. Japanese cars are typically softer than German cars. Always test a small section to find the least aggressive method that gets the result.

5. Chasing perfection on a daily driver. Your customer wants it to look amazing, not concours-level. Know when 80% correction is the smart call — it halves your time and doubles your profit margin.

If you want to learn the full system — from your first wash to building a profitable mobile detailing business — that's exactly what I teach inside Just Car Care Academy.