I have a three foot plaster (of Paris?) column and it has a strong, "soft" odor. It was outside in the past and it is now in my home. I feel like I'm breathing in spores. It has some black "stuff" in crevices and the start of patina green. Any advice?
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The black stuff is mold. A diluted solution of bleach will kill it.
Mold. Plaster retains moisture so it will be difficult to get rid of. Use a mold killer or bleach on it and keep in a dry wel ventilated area.
What you have is black mold.Clorox will help,but the best way to kill it is with vinegar.Black mold is very dangerous! Put a mask on ,then put the vinegar in a spray bottle and spray it on the stand outside.Scrub it down with a small brush.If this does not kill it ,then spray it down again!Do not get this mold on you,as I said,it is very dangerous!
Any solution would be a lot safer if you were able to take the column back outside to clean.
If it is in your house you will have to determine what might/can be ruined if a bleach solution is used.
A lot of people use a bleach solution (generally 1/2 cup to a gallon of water) but you should only use this in a well ventilated area, using gloves and also a mask would be safer. If necessary, a stronger solution (1 cup bleach to a gallon of water) can be used but the milder solution would probably work.
Let the solution remain for at least 15 minutes before rinsing with a water and maybe Dawn mixture.
I definitely prefer vinegar (same mixture (1/2 cup to gallon water) as there are no toxic fumes and will not ruin anything it touches.
A good rinse and use sunlight to finish the job.
It would be safer to get rid of this item If one of these methods does not completely remove the mold.
Odoban would take care of the mold, bacteria and odor in a less toxic way. It's around $6 at lowes or Walmart.
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