[trebleshot]

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Originally Posted by trekking95

Well all I ever saw was a lot of ash dust but the stuff I display in that room is dull grey (think The Enterprise). But the smoke goes out the chimney, very little ever blows back into the room. Its not like its an open campfire or anything. And this room is a good distance from the woodstove (which is a closed in iron box). Not coming into direct contact with the smoke should be fine then?

If you can smell the fireplace in your collection room, a small amount is getting in there. It may not be "open campfire"-level, but any amount will cause damage eventually if given enough time. Nature of the beast, I'm afraid.

When I was a kid, I had my collection in my room out of direct sunlight (totally by accident) and my father smoked in the house. He never smoked in my room yet my figures still yellowed due to the smoke damage. We were even on different floors: I was in the basement and he was on the first floor.

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And when you say soft-light bulbs do you mean soft light compact florescent or is this something else?

Soft light = soft white. The terms are interchangeable, depending on who you talk to. Basically, stay away from bright white bulbs and especially CFL's. Stick to soft white and incandescents, if possible. And as I said, regardless of what kind of bulb/light source you use, make sure it's not directly aimed at your figures. Ambient light is the best.

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Originally Posted by trekking95

I have never heard of soft light, so you mean soft white? And what about using LED bulbs? They wouldn't cause yellowing, would they?

Hard to say. I don't have any personal experience with LED's used as a light source for a room, nor have I read anything good or bad in that regard.

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Does anyone think that would make the plastic brittle? It shouldn't since it's just fixing the surface, not going right to the core.

Depends on the quality and type of plastic used. If it's cheap and/or thin, it could break it down and make it more brittle. And when I say cheap plastic, think dollar store Transformer knock-offs.

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Originally Posted by MegaPrime33

One of my Scout Troopers had turned yellowed and he wasn't exposed to smoke or sunlight. He had been sitting a large plastic bag with all of my other star wars figures and the rest of them are fine. No rhyme or reason why this one figured has yellowed.

Some plastics, especially ones used with older toys, would simply turn yellow due to years of exposure to the air. It's rare these days, but I've heard/read about it still happening from time to time.