Creating a grain finish

Oh, the stuff they ruin good furniture with on these ghastly 'make-over' programmes!  That, and the stripping of polish and varnish to paint god-awful "cheerful" colours over granny's old chest of drawers.   I'd come back and haunt anyone who did that to my old furniture. I will look up Annie Sloan, not expecting to be impressed.   Right, so that's what chalk paint is: a sort of Milk of Magnesia, that someone has run a comb through...  But what are you asking?  If you want to re-fashion an unfortunate bit of pine, that's one thing; if you're looking to create a similar look in an actual painting, there are easier ways to do it than go out and buy new paint; a bit of acrylic and a bit of scratching should do it: dark colour on first; thinned acrylic - or oil - on top when it's dried; then a scrape with whatever inscribing tool you have available, from the wrong end of a brush to a sharpened match-stick, and there you are; it would work in gouache, and even in watercolour, too.  

It wasn't as simple as it looked if you had no idea what a 'fire pit' was: this is more DIY and furniture restoration than 'art', and you'd probably get better advice on that sort of forum; I know they exist, but don't personally know of any to which I could post a useful link.  What I now see you're looking for is certainly painting, but not the sort most of us would consider our work.  But at least I've learned what a fire pit and chalk paint are, so your quest wasn't entirely in vain.  Restoration, wood restoration, furniture repair - a combination of those Google searches would probably help.