How do I fix surface imperfections in the cured resin surface?
Surface imperfections can result for a variety of reasons:
- Dimples can be the result of contaminants including dust or other particles landing in the wet resin.
- Fisheyes can be caused by grease, wax, or oil that prevents the resin from adhering to the substrate.
- An orange peel effect can be the result of a temperature dip during the first 24 hours of curing.
To fix surface imperfections, best practice is to sand down the entire surface with coarse, 80 grit sandpaper, wipe sanding debris clean and pour a fresh coat over top. You can try spot fixing, but we don’t recommend it: it’s very difficult to match the two resin layers and you will almost always see the seam where the fresh resin has been applied.
Amine blush is a sticky, waxy, or oily substance on the surface of the cured resin and is the result of excess humidity during curing. To remove amine blush, simply wipe the surface clean with warm soapy water (ideally a grease fighting dish soap) and a soft cloth.
For best results, and to avoid surface imperfections in the first place, use a dust cover to protect the resin while it cures, ensure the substrate is clean of grease, dust and is completely dry before pouring, and ensure the resin cures in a warm (70-80F or 21-27C) dry environment with no temperature fluctuations.