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Question:

I have a painting question concerning outdoor mold ?

Can you paint over mold ?

Answer:

yes you can try but put some KILTZ primer on it first. i think its water based i know it work inside
You can, but You Shouldn't. You need to kill the mildew (black) or mold (whatever color) with a 1/2 bleach 1/2 water solution. Then wash that off with water after you see the mildew/mold change color or disappear, preferably before the bleach water solution dries, with water (damp sponge, etc.). Then you can paint with latex or oil based paints. If you don't do this, it will continue to grow through whatever paint or primer you apply.
You can paint mold any color you want. The thing is, the mold(which is a plant) will die and let go of the surface it is sticking to and fall off. So will the paint on its back. That is why you read the instructions on the can. Clean surfaces of mold, grease,flaking paint, dirt and anything else that is not firmly affixed. Use TSP solution and wash the area down first, let dry and then sand with sandpaper and dust off with a rag and then paint. Any outdoor primer will do(never worried about, or even needed Bin or Kilz - which are more stain stoppers rather than primers). I personally like alykd primer. Add a little paint thinner to the paint 10-15%(I always seperate the paint into 2 pots when I got a full gallon-then I have room to add). Stir it in with a stir stick and the brush it on a cleaned surface. It goes on better than straight out of the can(using a natural bristle brush) and dries faster and harder. Let that dry a day, sand lightly to make smooth to your hand without sanding through the primer, and then apply the top coat...of whatever you want(Latex or Oil based paint) I would go for Hi gloss paint as it seems you are in an area that has a lot of moisture and not much air flow(the home of moss and mold). Gloss paint is a tighter finish with minimal pore size.
Creviced, I do not mean to argue with you. But lord knows you left a critical thing out. After spraying with a Bleach and water based solution (then letting completely dry), you need to be aware that one must sand the remaining solution prior to painting any surface with a Bin Zisser or Kilz product. The adherant quality is important to the end solution. After sealing with such a good product, then paint. Then paint all that you wish. It will do NO further harm.

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