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How to colour white resin after it has dried?

How to colour white resin after it has dried?

Techniques to transform cured white resin with vivid effects

“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System
"UV–Creation" - Fast Acrylic Resin, 3 Minute UV Cure

Colouring white resin after it has fully cured opens up a wealth of creative options for artists, hobbyists, and anyone seeking to refresh or customise finished resin objects. Whether you’re touching up details, repairing flaws, or adding new artistic layers, this guide explains practical methods to achieve a beautiful and lasting result on dry, cured resin—no matter your experience level.

What You’ll Need

“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System

See Examples of Custom-Coloured Resin

Browse unique works featuring coloured, painted, and pigmented white resin pieces to spark your creativity. Notice the variety of finishes—metallic, opaque, and translucent—accomplished using mica powders, liquid colourants, and skilled hand-painting techniques.

“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System

Step 1: Prepare and Clean the Resin Surface

A successful colour application begins with a pristine, smooth base. Wash your cured white resin object gently using a mild detergent or isopropyl alcohol to remove dust, oils, or release agents. After washing, dry thoroughly with a lint-free cloth.

For best adhesion, lightly abrade glossy areas using a fine-grit sandpaper or soft abrasive pad. This gives pigments or paint a slightly roughened surface to grip. Wipe any sanding dust away before moving to the next step.

Clean the surface thoroughly before adding any pigment or paint.

Step 2: Apply Pigments or Paints to Cured Resin

Choose your colouring method based on the look you want to achieve. For shimmering or pearlescent effects, sprinkle or brush “Sahara” – Mica Powder Pigment Metallic Motion Effect onto the surface or into a wet layer of clear resin/varnish. Gently buff or fix it in place for a stable metallic effect that adds dimension.

For bold, even colour, mix a small amount of “Colourfun” – Liquid Epoxy Resin Colourant with a clear resin or suitable medium, then apply a thin, even coat to the cured white surface. This method works especially well if you plan to seal the piece with a layer of clear resin after colouring.

Alternatively, use artist-quality acrylic paints for detailed designs or complete coverage. Use thin coats, letting each layer dry before adding the next for smooth, opaque results.

Use compatible pigments or quality acrylic paints for best adhesion.

“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System
“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System

Step 3: Seal or Finish the Coloured Resin

Once the colour or paint is dry and you’re happy with the result, protect it for long-lasting wear. For most projects, a clear acrylic varnish spray or brush-on resin topcoat is recommended. This layer shields against scratching, moisture and fading, especially on items that will be handled or displayed in sunlight.

If you used pigments with clear resin, the seal also locks in the shimmer and prevents transfer. Allow the piece to cure or dry fully before using or gifting.

Seal your coloured resin for long-lasting results.

Tips, Troubleshooting and Mistakes to Avoid

Apply colour only to fully cured, clean resin—residues or incomplete curing will ruin adhesion. Always test your colourant or paint on a hidden area first to check compatibility and effect, especially if using pigments with resin or varnish. Build up colour gradually in thin layers to prevent running or patchiness. For metallic pigments, finish with a clear sealer to protect the effect against rubbing and UV exposure.

Techniques for a Professional Finish

Try layering mica powder or pigment between coats of clear resin for 3D depth, or use fine brushes for hand-painted highlights. Explore combining different pigments and finishes on the same piece for striking, one-of-a-kind art.

“IWhite” - Polyurethane Casting Resin - White, Fast-Curing Two-Part System

Frequently Asked Questions

Can you paint over cured white resin?

Yes, most acrylic paints and compatible resin colourants can be applied when the resin is fully cured and properly cleaned and abraded.

Read the full guide

What are the best pigments for metallic colour on resin?

Mica powder pigments like Sahara are ideal for achieving strong metallic finishes on cured resin when applied and sealed correctly.

Read the full guide

Can I use liquid colourants on dry resin?

Liquid colourants should be mixed into a clear medium or resin and then applied as a top layer to cured resin for best results.

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How do I make coloured finishes last on white resin?

Always seal with a clear acrylic varnish or resin topcoat to protect the colour and finish from scratching or fading.

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What if the colour does not stick to my resin?

Ensure that the resin surface is thoroughly cleaned and lightly sanded before applying any pigments or paint.

Read the full guide

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