Andy I think what you are after is called hydro dipping. Selected colored paints are applied to the water in "layers" then stirred to break up the paint to give the camouflaged effect.
But seriously @andyanimal31 give these guys a hollah https://www.facebook.com/caveman.net.nz/?fref=ts $130 for a camo job done right!
Stick to your knitting oops fencing
Fletch
Bookmarks