Rusted screws and components
So I recently acquired a Raleigh Super Course Mk. II which i plan on using for commuting to school. Sorry, i realize pictures would be much appreciated but I currently I'm at home and being the bonehead that I am I left my pictures and what not with my bike at school.
Anywho, there are a few rusted screws and there shows signs of rust on the front derailleur which i want to take off and clean up. There are also a few small dots of rust on the back of the frame that I am partially worried may have spidered under the paint. The rusted screws are my main problem since I can't get them off, and they seem frozen (I'm not 100% sure I'm using this term correctly).
My question is, what do you all suggest for getting these screws un-frozen? i looked around and it seems some WD-40 and a little patience will get them loosened up? Also, I plan on giving my bike an oxalic acid bath, which seems like the way to go based on my forum readings, but for the next few weeks I don't think that i'll have the time to let it soak for a day. So is there anything that I can do to keep the rust from spreading in the mean time? Thanks in advance for any advice you can offer!