ok ive done 2 more coats of concrete, really solid now, and a coat of resin with a light coat of sand to avoid the glossy finish. ive also attempted to make some rocks the same way as the background but i don't think they look so good.
So ive been driving around everywhere, rivers, creeks, beaches, finding loads of rocks.
but after going through the 20-30 rocks back at home, only 4 of them work :-?
So im going to need to go for another look to find more.