What are the regulatory standards for the surface finishes and colors of internal hardware and modular equipment on the ISS?

When designing secondary hardware, instrument racks, or modular storage units intended for the pressurized environment of the International Space Station, are there specific standards regarding surface finish and color?

I understand that internal cabin colors are generally light/neutral to support visibility and psychological health, but are there technical requirements for the coating chemistry, emissivity, or reflectivity of these individual internal components?

Specifically:

1. Are there "approved" color palettes or gloss-level requirements to prevent glare or visual fatigue for the crew?

2. How do these specifications interact with the strict off-gassing and fire-safety standards mandated for all ISS hardware?

3. Are these surface specifications fixed for the life of the component, or is there a protocol for "refurbishing" or changing surface finishes during mid-life maintenance cycles?