Yes I have. There's plenty of wood there. I used a wood rasp to get the shape I wanted, then I used a finish remover to remove the rest of the finish. Remove the stock from the receiver and sand to the final shape. Check the stock and receiver fit often while sanding, you want the wood to be a little "proud" where it meets the receiver to prevent cracking or splitting. I've gotten good results with using an oil based stain and 5+ coats of tung oil. On the forend I just "rounded" the sharp edges and finished to match the stock.
It's really a pretty easy and fun project, I'd never done anything like that before, but was quite pleased with the results...
Just do it.
>>>===> Dave