it's better not to scrap it, your hurting yourself and worse, leaving scars. i have blackheads too, but since mine is only around the T-zone so I use ZA facial peel-off mask. It's pretty good, apply it like mask, and once it dries up, you can just peel it off and you see the blackheads stcking on it. it works almost like the Biore peel-off thingie that sticks on the nose.

but if those heads are really stubborn not peeling off no matter how you wash your face, then better go for a facial at any beauty centre.

lol depends at which beauty center you go I guess. I've seen them using a metal stick and "dig" for the unwanted stuff out. and it's painful, VERY painful.

you can use any facial scrub (those containing scrubbing beads) if you don't want mask. I'm not sure which brand is more suitable but decent ones that you can get in any drugstore will be alright.
I'm not sure if what I did was right or not. Before I scrub my face, I use warm water to clean my face first to let the pores open. Then only I scrub. Other than that, sometimes NBTD , I used my finger wrapped with tissue and slowly scrap out the heads. And it actually works for me