O.K., a question for you seasoned hands out there, I've now (finally) actually bent a receiver,  and am in the process of bending over the top rails.
My question is simple, "How in the heck do you get a smooth top rail surface?"
I've been "gently" tapping the rails FOREVER! and I still get a series of ripples across the surface .
I would think that after a while I would eventually beat the top surface smooth and in some compliance with the supported bottom surface, which is positioned by the form.
Is it just a matter of hammering away until I iron out the ripples?
Or is there more to it than that?

Thanks.

i've read in a few places to try using the flat side of a chisel (or comprable metal object), place it over the rail and hammer that. itll even out the force and there shouldn't be any of the little ripples.

Go to AK-Builder.com and watch his video.  Even if you do not have his bender and rail bender you can get the Idea.  Use a long steel bar to bend it all at once, while it is still in the bend fixture.  Good luck!