Yep I did it no problems so far. The rear sight on my CPO was slightly off center and the gun was shooting to the left so I wanted to adjust it. Took the slide off the gun, put a cloth under it to prevent marking then with a pair of plastic clamps I held it on the table. Few taps from a punch and a hammer and everything was good as center. No marks, no evidence. No issues and it works perfectly fine. This all said I plan on getting a set of 3-dot night sights as the dot the i setup of the SIG is not my preference. That being said my front sight fell out the dovetail the other day which means its become loose, but some locktight will hold that in place till I get a new one.
BTW, I am way to cheap to buy a sight pusher (if I could even find one, a few guys on this board have one and if you are really set on using one just borrow it and pay the shipping)