No. Every metal part needs the right surface preparation before powder coating, but not every part needs blasting. The choice depends on the metal, its current condition, the coating specification, and where the finished part will be used.
People often say “sandblasting” when they mean abrasive or media blasting. It is one way to remove stubborn material and prepare a surface. It is not a universal first step.
When blasting may be needed
Old coating, rust, and mill scale can change the prep plan. Powder Coated Tough’s pretreatment guidance says oxidized metal or mill scale may need media blasting before chemical pretreatment. The coater should choose the method and surface profile for the part and its finish requirements.
Blasting does not replace the rest of the preparation process. Oil, dust, and other residue still have to be addressed. For a deeper explanation, see our guide to why surface preparation matters.
When blasting may be unnecessary
A clean, new metal part may be prepared through cleaning and a suitable pretreatment without blasting. PPG describes blasting as a step used when required, alongside cleaning and possible chemical pretreatment. The correct sequence depends on the substrate and required performance.
Three questions that settle the decision
- What is on the metal now? Tell the coater about old paint or powder, rust, mill scale, oil, or visible contamination. Photos help, especially close-ups of problem areas.
- What is the base metal? Steel, aluminum, and other substrates can call for different preparation systems. Include the material grade when you know it.
- What must the finish withstand? State whether the part is indoors or outdoors and share any drawing, corrosion requirement, or coating specification. Do not assume the same prep is right for every use.
What to send with a quote request
Send clear photos of the full part and its surface; material and dimensions; quantity; existing coating or rust; intended use; and any areas that must stay uncoated. If you have a drawing or written coating specification, include it. Our quote-readiness checklist covers the rest.
Next step: Request a Salt City quote with those details so the team can review the actual part and recommend the preparation plan. Do not blast a part on your own merely because powder coating is planned; ask about the required surface condition first.