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BLW
repainting cinder block walls

My house exterior is cinder block. The previous owners painted latex over (weathered and aged) oil paint. I'm now stripping and scraping to get back down to an even surface. It's extremely labor intensive, sometimes needing 3-5 applications of chemical stripper (currently using JASCO Semi-Paste Multi-Surface Remover). Any suggestions on how to get it done more efficiently and effectively?

ordjen
Re: repainting cinder block walls

Have you tried renting a high pressure power washer? Even if not all of the failing paint comes off, the more that comes off without the stripper, the better. Cement block is not going to be damaged be a very vigorous power washing, as would wood.

Incidentally, acrylic latex paints are the paint of choice on masonry, after a good power washing. If the old finish is glossy, a dedicated acrylic primer would be a good idea first. 100% acrylic paints have very good adhesion in their own right.

Also, if your stripper is not water soluble, change to one that is. The power washer will once again do a better job of rinsing away all the gunk.

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