Rear pivot bolts

["adam_one_million" <acprice1@xxxx>]

I was crawling around under my car yesterday and noticed tham my rear 
pivot bolts have a gap betwen where the shock absorber mounts, and 
the nut that holds them in place. Is it okay to just tighten this up? 
Will I need to lift the rear end of the car? Its very dirty there 
also, should I clean it off first? What should I clean it with?

Also, my overflow bottle sometiimes ejects coolant. And some of it 
got on the frame under the bottle. I wiped it up, but there is likely 
a residue. What is the best way to completely clean this so that the 
frame and frame coating are not damaged by the antifreeze, or the 
cleaning?

Thanks. Adam