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Your best option would be to have the wall restuccoed with a smooth finish. Because you are putting new stucco over old stucco then you will have to use a bonding agent prior to the new coat. Attached is a link as an example:

http://www.quikrete.com/ProductLines/ConcreteBondingAdhesive.asp

Be sure to chip off any loose stucco or pieces that need repair. Powerwashing the surface will also need to be done and dried completely. You will want a clean and dry surface prior to apply the smooth finish coat of stucco. Quckcrete also has stucco products that you can purchase as well.

I recommend contacting atleast 3 contractors in your area and getting quotes on what this project will cost. This is not really a do it yourself project unless you have previous experience with stucco applications.

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Jay T.

You can brush it down with water. Basically want to remove any surface dirt that would prevent bonding. This way there will be no water runoff.

Jay T.