Dave Cooper's take on an otherwise fairly innocuous paint-by-numbers picture

The Corey Helford Gallery in Culver City, California has been showing a range of bastardised paint-by-numbers artworks for its latest exhibition, Charity by Numbers. Each painting has been completed in its requisite palette of mundane colours – there are nautical scenes here, depictions of riverside cabins, animals and forests there – and then a range of contemporary underground artists (including Boris Hoppek, Ian Stevenson and Dave Cooper, above) have added their own daubings onto the canvases.

While the works, quite literally, recycle the hand-painted vintage art of the thrift-shop (Cooper's starting canvas shown above) the new paintings are all up for auction, too, with proceeds going to the Alliance of Children's Rights charity. The online auction of art from the show is here and the vast range of paintings can be viewed on the gallery's website.

Gary Baseman's original paint-by-numbers canvas...

...and after he'd finished with it

Alex Padree's canvas depicted some rather fine ducks coming into land...

...but Oh No! They've been hijacked by some strange Seuss-like beings!

Boris Hoppek picked a wintry scene...

...and stuck some of his mute, but strangely compelling, characters in the foreground