Rust on tape heads

I've noticed a few spots of rust on some TU55 tape heads that I have. I'm wondering what I should do about it in the short term -- I've had an idea of putting something on the heads and then cleaning it off later, like oil or vaseline or... ? Any suggestions? Is there anything I can do with the heads later to clean the rust off? Are they totally hosed, or will they still work? This is on my "todo list" as far as restoration goes, just haven't gotten to it yet, but wanted to prevent any further damage if possible... Thanks in advance, -RK [If replying to me personally by email, you'll need to click on the URL that's mailed back to you to whitelist yourself.] -- Robert Krten, PARSE Software Devices +1 613 599 8316. Realtime Systems Architecture, Consulting, Books and Training at www.parse.com Looking for Digital Equipment Corp. PDP-1 through PDP-15 minicomputers!