How to protect metal during body repair
How to properly protect metal during body repair
Body repair after an accident or restoring an old vehicle isn't just about dent removal and welding. It's very important to properly protect the metal from corrosion to extend the life of the body and prevent future problems.
1. Rust removal – the first step
Before any repair work, the rust must be completely removed . This can be done in two ways:
- Mechanically: with a brush, sandpaper or sandblasting.
- Chemically: with a rust converter – a special substance that converts active rust into a stable compound.
Important: No traces of rust must remain under the filler or primer – otherwise moisture and oxygen would cause further corrosion.
2. Protecting the metal from corrosion
After sanding, the metal is exposed and vulnerable. Anti-corrosive primers are used for protection:
- Acid primer (phosphating) – provides excellent adhesion and chemical protection. Applied as a first thin coat.
- Epoxy primer – forms a robust, water- and airtight layer. Ideal for protection after welding and dent removal.
- Liquid zinc – a zinc-containing coating that replaces cold galvanizing. Suitable for protecting welds and hidden cavities.
3. Mistakes to avoid
One of the most common mistakes in metal preparation is using water when sanding or washing parts after dent removal and before filling. This should be strictly avoided because:
- The bare metal oxidizes immediately.
- Moisture residues penetrate under filler and primer layers.
- Even minimal moisture quickly leads to flaking and corrosion .
Use degreaser and compressed air for cleaning and carry out all work only in dry conditions.
4. Our recommendations
In our online shop you will find the entire range of corrosion protection materials for body repair:
- Effective and safe rust converters.
- Acid and epoxy primers – as spray and for filling.
- Liquid zinc – for reliable protection of weld seams.
We offer high-quality products from leading manufacturers at fair prices. If you have any questions, our experts will be happy to help you choose!
5. Conclusion
Protecting the metal during body repair is a crucial step that determines the lifespan of your vehicle. Using proven anti-corrosive materials, adhering to the application technology, and avoiding contact with water during the preparation phase will keep your body rust-free for many years.
