http://www.roadsters.com/gibbs/
Some examples of what magnesium does when it's left un-painted
Also:
http://www.bimmerboard.com/forums/posts/541377
http://forums.pelicanparts.com/porsc...an-shroud.html
And, bare mag in a Can-Am car (believe this is a vintage racer with some years on it, modified hoop and aeroquip stuff everywherel):
Another M8 with the bare mag covers, note these covers are 35 years old in this picture, though I'm sure they get plenty of attention these cars also just sit still in storage a lot:
http://mathewscollection.com/gallery/1970-mclaren-m8d/
And because it must be posted:
Now, I'm not saying you should just strip the covers and leave them bare with just a coating of penetrant and expect them to look like brazillion dollar vintage racer that gets wiped down with baby diapers with babies still in them, but still, not like they're going to disintigrate into nothing if left bare either so long as they're coated in something durable and hydrophobic. I still think the smartest play is to replace these with new covers while they're still available. But why not noodle about it one of the things I've seen popping up in my digging around on this, because this is a fun topic because most everything that comes with mag parts on it is cool, is Dow 7, but I would worry about the coating's durability especially on the business side of the cover where hot oil would be splashing
http://www.vintageeng.com/products/m...trans-am-indy/