I am getting ready to reinstall the bearing carrier in the l/u for my 1963 Merc 1000. This was a pain to remove (had to take it to a shop where they ended up using heat and a puller). Any suggestions as to what to use to clean up the corrosion without scratching the metal too bad. I am planning on using emory cloth, or 500 grit sandpaper. Also, do you suggest any lube/grease on the outside of the bearing carrier. The manual suggests thread seal for the retainer ring, but gives no suggestion for the carrier itself. I want to insure that if I have to crack the l/u open again in the future that it will come apart relatively easy. Is the thread seal a type of grease/graphite/lithium, or more of a locktite substance?<br />Thanks in advance.