Candy powder coats are unlike anything else in the finishing world. The depth, the color shift, the way they respond to light — there's no equivalent in solid colors. But they're also less forgiving than standard powder coats. Understanding how they work is the starting point for getting them right.

What a Candy Powder Coat Actually Is

A candy coat is a semi-transparent powder applied over a metallic base coat. The pigment in the candy layer is translucent — light passes through it, reflects off the metallic base beneath, and returns back through the candy layer to the viewer's eye. This creates an optical depth that solid colors cannot replicate. The metallic base is doing as much work as the candy itself.

This is fundamentally different from a metallic powder coat, which contains metallic flakes suspended in a solid pigment. Candy coats genuinely let you see into the finish, not just across its surface.

Choosing the Base Coat

The base coat color is the single most impactful decision in a candy job. More than the candy color itself, the base determines the final result. The same candy applied over different bases will look like completely different colors.

Silver base

The most common choice. Silver gives a cooler, cleaner, more neutral foundation. Candy reds over silver read as a classic deep crimson. Candy blues over silver stay true and cool-toned. It's the predictable, versatile option.

Gold base

Gold underneath warms everything up. A candy red over gold shifts towards burnt orange. A candy yellow over gold becomes rich and amber. Use gold intentionally — it changes the character of the candy considerably.

Chrome or polished base

Chrome-plated or highly polished base gives extreme reflectivity, which translates to maximum depth in the candy layer. It's harder to achieve consistently but the results can be spectacular. Small variations in the base reflectivity become visible through the candy, so the base prep must be perfect.

Important: Do not mix different metallic base types across panels on the same job. A silver base on one wheel and a gold base on another will produce visibly different candy colors — even with identical candy application. Commit to one base and use it throughout.

The Two-Stage Cure Process

Candy is always a two-stage process. The base coat goes on first and must be fully cured — at the correct temperature, for the correct time — before the candy is applied. Applying candy over an uncured base is one of the most common mistakes, and it results in adhesion failures and a cloudy, contaminated candy layer that you cannot fix without stripping back to bare metal.

After the base is fully cured and cooled, apply the candy. Cure the candy layer. Then, if you're applying a clear coat on top (which you should — more on this below), cure that as a third stage.

How Many Candy Coats?

The number of candy passes directly controls the depth and darkness of the final color. This is where the real artistry in candy work lives.

  • 1–2 light coats: lighter, brighter, more transparent — you can see more of the base metallic through the candy
  • 3–4 coats: richer, darker, more saturated — the candy builds and the depth increases
  • 5+ coats: very dark, highly saturated — at this point you're approaching opacity on some colors

There's no universally correct number of coats. It depends on the color, the base, and the look you're after. What matters above all is consistency: if you're coating four wheels, each one must receive exactly the same number of passes at the same distance and speed. Any variation will be visible when the wheels are on the car.

Spray Technique

Defects are far more visible in translucent finishes than in solid colors. A thin spot in a solid color is almost invisible. A thin spot in a candy coat shows as a brighter, lighter area that catches the eye immediately.

The technique requirements are stricter than for standard powder:

  • Maintain consistent distance from the surface throughout each pass — don't let the gun drift closer or further
  • Keep a consistent gun speed. Slowing down at the ends of passes adds extra material at the edges
  • Overlap each pass by 50% consistently
  • Avoid runs — runs in candy are very hard to repair invisibly. Better to do another light pass than to over-apply in one hit
  • Work in the same direction for all panels on a job

Clear Coat Over Candy

A clear coat over candy is not optional — it's essential. The candy layer contains metallic components near the surface that will oxidise over time without protection. The clear coat also adds additional gloss depth and makes the finish easier to clean. Use a compatible clear powder, apply one even coat after the candy is fully cured, and cure again per the data sheet.

Common Mistakes with Candy Coats

  • Applying candy over uncured base — the base must be fully cured and cooled first
  • Inconsistent application across panels — different pass counts or speeds produce visibly different colors
  • Using different base types on the same job — silver and gold bases under the same candy will look completely different
  • Skipping the clear coat — leaves the candy vulnerable to oxidation and UV damage
  • Poor substrate prep — any imperfections in the surface below the base coat are magnified by the candy layer's translucency

OpenThrottle Candy Range

The OpenThrottle candy range includes Auto Candy Star Teal, Auto Candy Star Yellow, Auto Candy Star Black, Auto Candy T. Red, Auto Candy Blue, and Auto Candy Purple. Each is formulated for consistent translucency and color saturation. Available from 5lb — enough for a set of wheels with plenty of material for consistent application.