Coolant Flush & Oil Pan Paint?

Hey guys, couple questions:

1) Got my coolant filter kit, but would like to flush the coolant and put in some ELC. Anyone flush the coolant themselves? Got any tips, advice or a How-To?

2) Also going to change my "oil-level adapter" gasket (where the dip-stick tube enters the oil pan), but would like to paint/coat the pan while the oil filter and starter are off. Was going to use this rubberized frame coating I use on frames and under body stuff, but thinking about it, that would be terrible to use on the hot oil pan. Any suggestions for something more durable than just engine paint to protect the oil pan from corrosion? It's not rusted through or too bad, but where the paint flaked off, it's getting pretty rough.

Thanks guys!

the guzzles site has the procedure for coolant flush, pretty simple IMO. Something like Gooches Flush Procedure

No clue on paint, I need to do the same...starting to get some rust that I need to take care of

Por-15 on the oil pan. Put it on my pan 2 years ago and it still looks brand new.