Agreed. Also, you don't need or want as fine of a finish as is required for a MHG, it gives the head and block more surface area to hold the gasket with.
Aluminum paint?? That's a new one to me. I'd recommend one of the Hylomar gasket dressings (make sure it's one of the formulas specified for head gaskets) or a copper HG spray. The reason for using an actual gasket dressing is that they are formulated NOT to cure and will remain tacky.
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