HG install techniques

[Onefast99gsx]

Last night I lined up my 3 timing marks as shown in the factory manual and i pulled the head off my car. When you pull the head off, you realize how apart your car really is. I pulled the head gasket off. My question: How do you clean the head gasket surface on the block. The stuff from the gasket is really caked on there. What do you guys use?

Thanks.