You can try a spray type gasket remover with a scraper just to "dig" in.
A blown gasket can be repaired by replacing the gasket...if you are talking about the head gasket, then you have to remove the cylinder head from the engine block and replace the gasket that is inbetween them. Cracked heads generally have to be replaced because they are made of aluminum which cannot be repaired permanently once it is cracked.
If it is a deep scratch you cannot usually remove it. Sometimes if a scratch is somewhat on the surface then a floor stripper might remove its appearance.
Remove the cylinder head from your VW engine. Remove the head gasket and clean the head gasket surface. Put the new head gasket on and return the cylinder head to its original position.
Remove the cylinder heads from your Chevy engine. Remove the head gasket and clean the head gasket surface. Put the new head gasket on and reverse the process.
You will need to remove the cylinder heads. Remove the old head gasket and clean the head gasket surface. Put the new head gasket on and reverse the process.
Remove the intake manifold retaining bolts on your 2003 Chevrolet Malibu. The manifold will come off. Remove the manifold gasket and clean the surface. Put the new manifold gasket on and reverse the process.
Remove the intake manifold retaining bolts from your 1993 Mercedes-Benz manifold. Remove the old manifold gasket. Clean the surface and put the new gasket on.
remove head and replace gasket :)
First, remove intakes and anything else in the way. Remove valve cover. Remove head. Remove old gasket. Clean gasket surface. Reinstall. You're welcome.
Such hard abrasion will scratch the metal surface. This will make future cleaning more difficult as staining will get inside the scratches and be difficult to remove.
You cannot repair a blown head gasket, you must remove the heads and replace the gasket.
You remove the bolts to the oil pan and the pull the oil pan off and the gasket.