Fritz.........

I haven't used those two items.............. but I did have good luck using acetone.
1st I had to strip off the old urethane finish (not necessary if your rifle has an oil finish) and worked the stock with acetone and decreasing grades of steel wool. this bleached out most all of the color real well.
Just make sure to wear good rubber gloves while working with the acetone and don't use any plastic containers. []