'Lo Noban ,
While Intel6 is right about it being easier to use a belt or disc sander , if you have the patience , you can get the pad down with a small block of wood wrapped with sand paper . Kickeeez
pads seem to take the most patience ; if it's already close to what you want use a fine grade , 120 grit or higher .
Some people say that when you get really close that a wet/dry
paper with a bit of water is the best way to finish ; but , I haven't had to do that with mine .
If you don't mind spending a few $ then, the rubber auto body
type "holder" works pretty good and is easy to get the paper on and off and is somewhat easier on the hands .
If you have to work with the pad on the stock , mask the stock with something - - -anything is better than nothing - and work
perpendicular , more or less , to the axis of the barrel .
Just don't rush it , Hawkaaa53