USED to be available at Bunnings - not anymore.
This effect can be recreated though if you have an air brush or spray gun... its basically an oil based paint with water in it - the 2 do not mix and so the colour comes out in strings, by varying thr pressure and nozzle size you get different effects... im sure this has been discussed before on the forum.... somewhere!
Depends on the store - It was stocked in one of my local bunnings store - but not the other.