"We've been employing industrial chemists for five years, and they've come up with a product called Smart Wipeout," Mr Smart said.
"You just spray, paint or brush it on any surface - including painted ones - leave it for 60 seconds, and then high-pressure hose it off."
The product attacks only the chemicals in spray paint, leaving the surface intact.
Smart Wipeout sells for $29.95 per litre. About five litres are needed to clean a wall of the size pictured.
Net link: www.smartdistribution.com.au