How do you make a haunted house dusty like in the movies?

How do you make a haunted house dusty like in the movies? So that everything looks like it's been there for years. I was guessing that they use a burlap sack full or flour and pigments and toss it about, but does anyone have other ideas? My friend wants to make an authentic looking haunted house.

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krabiz123 says: Oct 15, 2012. 3:59 AM
grey cement ,beach sand.
Toga_Dan says: Oct 6, 2012. 2:06 PM
baking soda? charcoal powder?
instructable person 9 says: Oct 6, 2012. 3:32 AM
flour,sand,and crushed chalk combined
Goodhart says: Sep 30, 2008. 12:13 PM
Yes, the chalk might be more work, but you can probably get shades of grey or light blue that would look a lot like dust.
If you have to get a lot of it airborne in order to have it settle naturally, wear a filter mask (especially if using talcum powder).
jessyratfink in reply to GoodhartOct 2, 2008. 8:53 AM
Yeah, I think gray chalk would be the best bet. :D I also second the mask bit.
11010010110 says: Oct 2, 2008. 8:03 AM
Angle grinder Piece of concrete Dust mask and dust tight safety goggles
NachoMahma says: Sep 30, 2008. 11:15 AM
. Flour is likely to attract insects and other undesirables. I'd try something like talcum powder or ground chalk.
goosezilla (author) in reply to NachoMahmaSep 30, 2008. 2:26 PM
Ah, great idea! That' much better than flour.
Chicken2209 in reply to NachoMahmaSep 30, 2008. 12:10 PM
i think thats too white needs to be more gray i don't know if they make nonbleached talcum power but that would be best if its a good color
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