Common powder coating myths debunked by Advanced Powder Coating & Sand Blasting in Sydney. Learn the truth about sand blasting, rust, primer, durability, surface preparation and long-lasting powder coated finishes.
Powder coating is one of the most durable metal finishing options available, but there is a lot of incorrect information out there. This guide explains what is true, what is not, and why proper preparation matters.
1. Powder coating is just paint
2. Powder coating never chips
3. You can powder coat over rust
4. Powder coating does not require sand blasting
5. Powder coating hides imperfections
6. Powder coating does not need primer
7. Powder coating can go over existing powder coating
8. Thicker powder coating is better
9. Powder coating stops rust forever
10. Powder coating is scratch proof
11. Powder coating never fades
12. All powder coaters use the same powder
13. Powder coating is always better than paint
14. Powder coating is too expensive
15. DIY powder coating is the same as professional powder coating
Powder coating is not spray paint. It is a dry finishing process where powder is electrostatically applied to metal and cured in an oven to create a strong protective coating.
Powder coating is tough, but no coating is indestructible. Heavy impacts, poor preparation or incorrect curing can still cause chips, cracks or peeling.
Rust must be removed before powder coating. If corrosion is trapped underneath the coating, it can continue spreading and eventually cause bubbling or failure.
Not every part needs sand blasting, but rusty, painted, scaled or contaminated metal usually needs abrasive blasting to create the right surface for adhesion.
Powder coating is not body filler. Grinder marks, dents, rust pitting, weld spatter and scratches can still show through after coating.
Some jobs can be coated directly, but outdoor, coastal, industrial and high-corrosion applications may benefit from zinc or epoxy primer systems.
Recoating over old powder is usually not recommended. Old coating may have contamination, UV damage, weak adhesion or hidden corrosion underneath.
Too much powder can cause orange peel, cracking, poor fitment and curing issues. Correct film thickness is more important than simply applying more powder.
Powder coating gives excellent protection, but damaged coating or exposed bare steel can still rust. Proper preparation and maintenance matter.
Powder coating is scratch resistant, not scratch proof. Sharp objects, dragging, impact damage and poor handling can still mark the finish.
High-quality exterior powders resist fading, but harsh Australian sun, poor powder choice or incorrect application can affect long-term gloss and colour.
Different powders suit different jobs. Outdoor durability, UV resistance, colour, texture, corrosion protection and finish type all matter.
Powder coating is excellent for many metal parts, but some jobs may be better suited to Cerakote, wet paint, galvanising or other coating systems.
Cheap coating can cost more later if it fails. Quality preparation, blasting, primer and correct curing can provide better long-term value.
Professional powder coating uses proper surface preparation, commercial equipment, controlled ovens and experienced application techniques.
The best powder coating results start before the powder is applied. Cleaning, degreasing, abrasive blasting and correct pretreatment all help the coating bond properly to the metal.
If a surface is rusty, oily, painted, contaminated or poorly prepared, the powder coating may look fine at first but fail early. This is why proper sand blasting and preparation are so important for long-lasting powder coated finishes.
At Advanced Powder Coating & Sand Blasting, we inspect every job before coating and recommend the right preparation method for the material, condition and final application.
Not always, but sand blasting is often required for rusty, painted, scaled or contaminated metal parts.
No. Rust should be removed before powder coating to prevent corrosion continuing underneath the finish.
No. Powder coating follows the surface underneath. Dents, grinder marks, weld spatter and pitting can still show after coating.
It is usually better to strip or blast old coating off first so the new finish bonds to a clean, stable surface.
For many metal parts, yes. However, the best finish depends on the material, environment, temperature exposure and final use.
Send us photos of your wheels, frames, parts, gates, brackets or industrial components. We can advise whether they need sand blasting, powder coating, primer, Cerakote or another finishing option.
Get honest advice before coating your wheels, automotive parts, frames, gates, brackets or industrial components.
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