After you clean and oil the chain, grab a copy of War and Peace and start wiping it down.
You should be bored out of your skull and a few hundred revolutions of the crank is not excessive... just make sure you stay clear of the chain ring and rear cog as we know how nasty that can be.
The chain should feel dry when you are done and then do this again after you have ridden some miles as the oil from the inside will work itself out.
Under most riding conditions, 800 miles is too long to go without giving your chain a really deep cleaning.
I know many folks who run two chains and swap them at regular intervals to even out the wear... the unused chain gets a solvent bath while the other is at work and this appears to greatly extend chain life.