whenever doing front or rear cover work i highly suggest the first things done after removal are the wiping of the area's around the main oil galley holes with brake cleaner and lint free rags and small discs of blue tape placed over em to block em off while you scrape the gasket material off the block (cover T chain with rag, rear of crank, etc)
when scraping the gaskets i highly suggest buying a 100 pack of single edge blades and a good quality pushable blade holder. on the paper gasket youll find its easier to "slice" the gasket off than to push or cut it off...specially that damn sealant bead.....cut it like a turkey, change blades often and flip new blades over each cut to give yourself more "cut time" before the edge curl is destroyed and it no longer slices nicely.
be clean, i tend to blow 30-60$ on brake cleaner, 10 on kerosene (need a new "clean" batch for each motor) and 20 on towels and 2" blue masking tape.
that ****s cheap compared to a motor.
also get intot he habbit of never handing tools or moving things OVER a motor that open...crud stuck to the bottom of a sealant can...on a socket (you do clean your sockets beforehand right? dont want a barrel of rust from that last brake job fallin in there....