Dealing with rusted and corroded bolts, parts, etc...

Was wondering what others use for dealing with rusted and/or corroded parts that are stubborn to separate or loosen? There are several types of lubricates and grim eaters, as well as using heat with them.

I know PB Blaster is often recommended, but I've wondered if CLR would also do a decent job on removing rust and corrosion. Other then potentially damaging paint or finish, which may sometimes not be a concern anyways, would CLR work fine?

I think the toughest thing CLR can remove is lime scale. I don't think it works well on rust(I've never seen it advertised as a rust remover).
PB works well. Sometimes you need to work the nut or bolt back & fourth, spraying it every couple back & fourths.

I think the toughest thing CLR can remove is lime scale. I don't think it works well on rust(I've never seen it advertised as a rust remover).
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CLR has rust removal right in the name.
Calcium Lime Rust.

http://en.wikipedia.org/wiki/Calcium_Lime_Rust

CLR is okay if you can immerse your rusty parts in a container of CLR. But it does not cling well to parts on a vehicle, so its of limited use.
Rust-dissolving lubricants like "Liquid Wrench" dissolve rust, lubricate parts and cling to surfaces, and work better.

CLR has rust removal right in the name.
Calcium Lime Rust.

Lol, sorry for the misinformation. Thank you MagicRat.

I'm going to second that PB Blaster recommendation. It's the best product for rusted/corroded bolts that I've used.

The first time I used it... I had this rusted bolt I couldn't get off. I tried a variety of things for over a week. It was in the worse place (couldn't even cut it off). I was on the verge of attempting to drill it out when I sprayed it down with PB Blaster - that thing was off 5 minutes later. There's my PB Blaster commercial.

I have used CLR in my heater coil to help clean out the dirt & grime... it works pretty good for that (but I agree with MagicRat - I think if you use CLR you will need to immerse what you want to clean). I also have Liquid Wrench - but I don't think it works anywhere near as well as PB Blaster because I had tried it on that afore mentioned rusty bolt and it made zero impact.