Saturday, April 14, 2012

Mildewed Models

(Breyer History Diva, 2010.)

Speaking of condition issues, the Foal was found in a rather large collection of horses, mostly dating from the 1980s. They were a reasonably decent lot, quality wise, except for one thing: most of them were mildew dappled. It was a shame, since some of them had beautiful paint jobs. The prices were reasonable, so I picked out a few of the choicer items, and left the rest behind.

Mildew dappling is most often seen on models with matte-finished bay, chestnut or palomino paint jobs, usually from the 1970s or 1980s. The mildew attacks and eats at the topmost surface of the paint, creating an effect not unlike resist dapples. Whenever I see a listing on eBay or MHSP that mentions dappling on a vintage model that’s not supposed to be, I almost always assume mildew is at fault. There are a few genuine vintage test colors of dappled non-grays, but they’re pretty rare and fairly distinctive.

Why models of that time period are prone to mildew is unknown. By that time, the clear topcoat that was sprayed over most matte-finished models had been discontinued, and I suspect that that’s what was preventing the mildew from forming before. It "sealed" the plastic from direct exposure to the mildew spores. That might explain the absence of widespread mildew damage on Alabasters and Dapple Grays: they continued to get this topcoat for some time after it was discontinued elsewhere.

There’s not a lot that can be done to reverse mildew damage. I’ve found that a quick, modestly strong bleach bath helps. It doesn’t eliminate much of the dappling, but it does kill off the mildew and keep it from spreading.

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