Repsol NSR500 1998 Blue Siren

Repsol NSR500 1998 Blue Siren: RAL 5025 with a pearlescent depth

RAL 5025 Pearl Gentian Blue is the pearlescent member of the RAL blue family, a deep gentian blue enriched with effect pigments that give it a silky, shifting sheen. It is used on architecture, commercial vehicles and design objects that need a premium blue. For modelers it is an excellent match for deep blue racing motorcycle schemes of the late 1990s, where dark pearl blues were paired with orange and white, and it works equally well for touring cars, trucks and custom builds. Build it up gradually for even pearl distribution.

The problem with pearls

Pearl effects show every mistake: wet passes cluster the pearl into blotches, and uneven coats change the colour from panel to panel. Controlled, even, slightly drier passes give a smooth, consistent shimmer.

How to apply

1. Shake the bottle for at least 60 seconds.
2. Prime with a grey primer and let it dry fully.
3. Airbrush straight from the bottle, no thinning needed. Use a 0.2–0.4 mm nozzle at around 20 PSI (1.4 bar) and apply light, cross-hatched coats, letting each one flash off before the next.
4. Keep the airbrush moving at a constant distance for an even effect.
5. Let the paint cure overnight before masking or clear-coating.
6. Seal with a water-based clear coat: gloss for a factory shine, or satin or matte for work vehicles and interiors.
7. Clean the airbrush with water before the paint dries.

Why modelers choose Koloi Aqua

• Ready to spray: no guessing thinning ratios, the same result from every bottle
• Cleans up with water, so there are no strong solvent fumes at the bench
• Fine pigment grind for 1:8 to 1:72 scales, so panel lines and detail stay crisp
• One system: primer, colour and clear designed to work together

Shelf life

Estimated shelf life of more than 12 months when stored tightly closed between +10 °C and +28 °C, away from frost and direct sunlight. Shake well before use; if the paint has thickened or separated and does not remix, do not use it.

💡 Need a colour we don’t list? Our colour lab matches RAL, RLM and OEM paint codes on request.

The on-screen image is indicative: the final tone depends on the primer, the number of coats and the clear coat. Metallic, pearl and multi-layer effects cannot be fully represented on screen. Keep out of reach of children. Safety Data Sheet available on request.

Vehicle, manufacturer, team and sponsor names are used only to identify the colour reference. Fire Scale Modeler is not affiliated with or endorsed by the trademark owners.