It seems I underestimated the size of cardboard I needed to do a light painting job. I've now got a nice faint black outline of that piece on the garage floor.
I know it'll wear away naturally, but is there a faster/better way to do it? Some chemical and a power spray?
bmoney
Latex paint or??
Charlie
a power washer might speed the process of removal
cheap black spraypaint - i'd assume non-water based...some chemical you're thinking of?
Look at the spray can. Does it tell you what to use for clean up?
We used Formula 409 to remove overspray from neighbor's paint disaster - parquet floor, formica cabinets and counters, wood banister. (The trash was full of beer cans when the painter finished :o) This was dry but not fully cured latex paint. If your paint hasn't cured, strong detergent and very hot water and scrub brush may work. Take it up with wet vac. Any solvent is likely to sink the paint deeper into porous surface, if it even touches the enamel. I've used two kinds of paint remover to try to get old paint off concrete decks; only spots it worked on were drips that were not wiped down into the concrete but just sitting where they landed and could be "lifted" off surface of the stripper with a scraper.
If you are good at mixing colors, and the black is irritating enough, you could mix up some acryllic craft paint to the right color and dab it over with a very lightly loaded stencil brush to help camouflage it.
either the paint can be cleaned out of the concrete surface, or if it has infiltrated the concrete enough you will have to remove a thin layer of the surface concrete to get rid of the coloration
many concrete cleaners are available
if those don't work, removing a thin layer of the surface concrete can be achieved with a pressure washer or the concrete surface can be etched with acid, both should be done by someone qualified
if cleaning doesn't work and removal is not an option, covering up the coloration could be achieved with some of the quickrete products available in retail outlets, you might not be able to match colors precisely between the garage floor and the patch, experimentation on an inconspicuous area or extra concrete before making the patch cover is wise
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