gasket removal tips needed.

[S13 240SX]

trying to remove my old gasket off my intake mainfold and its not going soo good..

its like burnt on at some spots and I can't get fully off and clean.

i used gasket removal spray can and soft brush, i used some gas.

and i'm tryin to be real carefull about getting it off without making a sratch.

what do you guys do?

thanks.