Avoid White Mold on Your Scale Model Collection

A thin, fuzzy layer of white fuzz creeps across the corner of a vintage resin figure, looking more like a dusting of snow than a collector's nightmare. If you've noticed this, you're likely dealing with mold, a common issue for collectors of high-end scale models and even certain fashion collectibles. This post explains how to identify, prevent, and treat mold to keep your investment safe.

How do I identify white mold on scale models?

White mold appears as a fuzzy, non-uniform coating on surfaces that doesn't wipe away easily with a dry cloth. It often targets organic materials or certain types of porous resins and fabrics found in high-end figure bases or clothing-inspired collectibles. Unlike simple dust, mold is a living organism—a fungus—that thrives in stagnant, humid environments.

If you see a fine, white "webbing" on a piece of a 1/6 scale figure's fabric clothing or a resin base, take action immediately. It's not just a cosmetic issue; it can actually degrade the material over time.

How can I prevent mold from growing on my collection?

The best way to prevent mold is to maintain a consistent humidity level below 50% and ensure proper airflow around your display cases.

Most collectors make the mistake of sealing their display cases too tightly. While airtight cases protect against dust, they also trap moisture. If you're displaying items in a room without climate control, you're asking for trouble. Here are a few ways to keep the air moving:

• Use Silica Gel: Place food-grade silica gel packets inside your display cases to absorb excess moisture.
• Air Circulation: Don't crowd your models too closely together; leave a little breathing room between figures.
• Monitor Humidity: Use a digital hygrometer to track the moisture levels in your room.

For more on long-term preservation, check out my previous post on protecting your resin models from UV damage and fading, as light and heat often go hand-in-hand with humidity issues.

What should I do if I find mold on a collectible?

If you find mold, isolate the affected item immediately to prevent spores from spreading to your other pieces. You shouldn't just blow it off with compressed air, as that actually spreads the spores into the air.

Depending on the material, your cleaning method will change. A soft brush might work for hard plastic, but fabric components require more care. Refer to the Wikipedia entry on mold to understand the biological risks of leaving it untreated.

That said, if the mold has penetrated deep into a porous material, it might be a permanent loss. Always test a small, inconspicuous area first to ensure your cleaning agent doesn't strip the paint or finish.