Kaleido K303 Metallic Red Paint 20ml

Kaleido K303: the metallic red that makes a difference on the track and the workbench

Within the Kaleido Colorworks RapidAir™ range from Gaahleri, the K303 Metallic Red is one of those shades that grabs attention at first glance. It is not just a bright red: the ultrafine metallic pigmentation suspended within it provides a depth and shine that conventional acrylic reds rarely achieve. For those dedicated to decorating slot car bodies, static models, or figures and dioramas, this shade opens up a range of possibilities from competition bodies to details on a miniature or a period diorama piece.

RapidAir™ Technology: why it matters in practice

The RapidAir™ technology is the central axis of the entire Kaleido Colorworks series. Its purpose is to eliminate the common issues of water-based acrylic paints when working with an airbrush: cracking, overly defined edges, the tendency to clog fine needles, and irregularity in the seating of metallic particles. RapidAir™ ensures that metallic pigment particles are evenly distributed during application and self-level upon settling on the surface, reducing the appearance of shiny spots or dull areas. The result is a continuous and uniform layer that does not require additional correction coats.

Another advantage of this technology is the drying speed. When working with an airbrush in fine passes, the time between layers is significantly reduced, greatly speeding up the process when wanting to build intensity progressively or combine the K303 with other shades from the series for gradient or shading effects.

Applications: where this metallic red shines

• Slot car bodies: Ideal for ABS or resin bodies seeking the appearance of a competition car lacquered in red. The adhesion on prepared ABS is solid, and the resistance to mechanical wear it offers once cured is notable for track use.
• Static models: Perfect for body panels of scale cars, aircraft, or military vehicles where a metallic touch is desired on the base red colour.
• Figures and dioramas: Although not its most common use, this metallic finish can be integrated into decorative pieces, metallic elements in scenes, or details requiring a shiny and reddish finish.

Compatibility and surfaces

The K303 Metallic Red adheres well to ABS, resin, and metal, provided the surface is clean, degreased, and, in the case of porous or very smooth materials, treated with an appropriate primer. Being a water-based acrylic formula, it is compatible with glossy, satin, or matte acrylic finishing varnishes applied as a final coat to protect the finished work.

Regarding dilution, the paint comes out of the bottle ready for airbrushing with needles between 0.3 and 0.5 mm, which is the most common working range in scale modelling. If a more transparent effect is desired or if working with very thin layers for shading, it can be slightly diluted with distilled water or the specific thinner from the Kaleido series, without affecting the stability of the metallic pigment.

Finishes and colour behaviour

The K303 shade offers a bright metallic finish with high luminosity. The density of the red is intense even in thin layers, meaning that not many passes are needed to cover a dark surface. On white or light grey backgrounds, the metallic finish gains vibrancy; on black primers, the shade darkens slightly and acquires a more dramatic and deep character, very suitable for wear or controlled aging effects.

Once dry, the paint film achieves a hardness that withstands regular handling and light scuffs well, making it particularly practical for pieces that will be frequently handled.

Application tips

• Shake well before use: Metallic particles tend to settle. A vigorous shake of at least 60 seconds ensures a homogeneous suspension of the pigment.
• Ambient humidity: It is recommended to work in environments with relative humidity below 80% to ensure proper drying and avoid a matte or veiled surface.
• Airbrush pressure: A working range of between 15 and 20 psi usually yields good results with this paint, although it is advisable to adjust it according to the airbrush and the application distance.
• Airbrush cleaning: As it is a water-based formula, cleaning is straightforward: warm water and a specific cleaner for acrylics are sufficient to keep the airbrush in perfect condition.
• Finishing varnish: To maximise the durability of the metallic colour and protect the final work, it is advisable to apply a layer of glossy varnish compatible with acrylics once the paint is fully cured.

Frequently asked questions

Is it necessary to prime the surface before applying the K303?

On smooth surfaces like ABS or metal, it is recommended to use a primer beforehand to improve adhesion and prevent the paint from peeling over time. On porous resins or rough materials, direct adhesion is usually better, although primer always helps achieve a more uniform finish.

Can the K303 be mixed with other colours from the Kaleido series?

Yes. Sharing the same water-based acrylic base and RapidAir™ technology, the colours from the Kaleido series are compatible with each other. They can be mixed to achieve intermediate shades or adjust the intensity of the metallic finish, although it is advisable to test on a test surface before applying to the final piece.

How long does it take to dry between layers?

Applied in thin layers with an airbrush, the paint allows work to be resumed in a few minutes. For complete curing before applying varnish or handling the piece intensively, it is recommended to wait at least 24 hours at room temperature.

Is this paint valid for brush use or only for airbrush?

Although it is formulated and optimised for airbrush, it can be used with a brush for touch-ups or small details. For large surfaces, the airbrush provides a much more uniform result and better utilises the properties of the RapidAir™ technology.

Does the metallic finish need varnish to maintain its shine?

The K303 retains its metallic shine without varnish, but a layer of glossy varnish compatible with acrylics increases the durability of the finish and protects it against wear and continuous handling, especially on frequently used pieces like slot car bodies.

The Kaleido K303 Metallic Red 20ml by Gaahleri is a premium water-based acrylic paint featuring RapidAir™ technology, designed for airbrushing scale models, slot car bodies, and dioramas. Its ultrafine metallic pigment delivers a deep, uniform metallic red finish with excellent adhesion on ABS, resin, and metal surfaces. Ready to spray straight from the bottle with 0.3–0.5mm nozzles, it combines the performance of solvent-based paints with the safety and ease of acrylics. A top choice for scale modellers and slot enthusiasts looking for professional metallic red results.