4 methods by budget
- White vinegar (5€) — surface rust only
- Phosphoric acid (15-25€) — moderate rust, needs neutralization
- Electrolysis with car charger (30-50€) — best for deep rust, no metal damage
- Resin coating kit (50-100€) — for leaking or heavily pitted tanks
Ask the AI mechanic — describe your tank's condition, the AI recommends the optimal method.



