I know of a gun smith who has used plasticote stone effect spray paints to good effect on tired rimmy stocks, leaves a textured grippy finish. Not my cuppa tea but seems to work great for the little cost.
I've done numerous stocks and rifles in the past with krylon rattle can, if done right can look good and depending on how hard you are on your rifles the finish will last a while. A top coat of Matt varnish applied with a lint free cloth can help too.
Depending if you want a grippy panel on the pistol grip and fore-end this can be achieved with no nails a taped off area with approx 2-3mm deep of no nails and using a ruler or something similar 'pat' the area to give it an artex look, then remove tape once happy and allow to dry completely. The sharp points will brush off leaving a good panel of grip. An old BSA Superten got that treatment.
The Rapid 12 .25 got similar and a net camo effect