Finishing Design-Cast 66

You can patch the surface of hardened DC-66 with some freshly mixed material.

Patching Procedure

1. First, roughen the area to be patched by coarse sanding or grinding.
2. Then thoroughly saturate the area with water.
3. For best results, patch the piece as soon as possible after it has hardened.
4. After patching, keep the piece damp for 24 hours to allow the patch to harden fully.

You can grind or polish hardened DESIGN-CAST 66 surfaces using abrasive papers, or polishing compounds. Do not use metal tools—they are not as hard as DESIGN-CAST, and metal will come off onto the piece.

You can apply different kinds of coatings to DESIGN-CAST surfaces, with excellent adhesion. Water, oil, and solvent based materials all work. If using anything other than a water-based coating, you must first let the piece dry thoroughly. In general, breathable type coatings are recommended, such as water-base acrylics.

DESIGN-CAST sealers AA-6 (matte) or AA-7 (gloss) are recommended when you want a clear and colorless protective coating. Either of these sealers also makes an excellent patina base for the addition of tinting colors, such as the universal pigments used for paints.

A variety of patina coatings can be obtained from the suppliers listed on our Sources page.