Originally Posted by
Juggler2
WD40 is great for displacing water. However you'd be further ahead to use penetrating oil on a rusty chain. PB Blaster is very good.
I did just that, To get the bike I got for my daughter at a Sheriffs sale working, until I get my lazy ***** to get a new chain. The chain was coated with a more than light rust, I wasn't expecting much. I hosed it down with the PB Blaster, wiped off the excess, and put it on the bike. The result was quite surprising, it worked pretty smooth, not perfect, but good enough that there is no rush for a new chain. Of course
YMMV.