Base Gasket Removal

So I have been having a real hard time removing this base gasket. I have been at it for about 3 weeks now. At first I was using carb cleaner and switching between a razor blade and a brass wire brush. I had some kerosene on hand so I gave that a shot. I wasn't getting very far with these chemicals so I started using acetone for a while. That started to get me a little further but had seemed to stop being as effective. I then tried Permatex and got almost no results with that, so I have moved to Jasco paint and epoxy remover this like the acetone worked for alittle but soon its effectiveness seemed to stop. I still have about 25% of the gasket on the cyilender block. Any suggestions on where to go from here?

Aqua blast.

Keep at it. The paint stripper should soften the top skin. Be sure keep the surface wet and allow it to dwell for a few hours before going over to the scraping.
Removing that gasket is one of the suckiest jobs in all of an engine rebuild. It goes to show how tough the OEM gaskets were. Be sure to get an OEM replacement. You need a good tough gasket for that application that won't compress under clamp loads. Aftermarket gaskets are like cheese in comparison, which results in a lot of torque falloff which leads to reduced clamp loads and oil leaks.