The texture I got was through marbelizing. This can be done extremely easily with spray paint. I'd recommend rustoleum or krylon paints depending on what you are putting it on. Get a nice, even, light coat on the object, and then take some saran/plastic/cling wrap and apply it to the surface.
Rubbing it, patting it, pressing down and then moving your fingers. All give slightly different looks and also depend on how heavily the paint was applied. You then just pull the plastic wrap off. Can apply another piece to get even more of the paint off.
Depending on how subtle you want it, it may be best to put the color you want to be sparse as a base coat, let it dry for 24 hours, and then put your other color on top of it and use the saran wrap, as you can control how much of the undercoat shows as well.
Different techniques net different results. I'd try it on a scrap piece of whatever you're painting before doing it else where.
Unfortunately I do not have access to spray paint here, and am using an airbrush. Not too happy with the way the paint came out. It definitely is not as permanent as I would like it to be. Going to try and find some other brand of paint and redo it at some point.