OT: bodywork

Hi all,

I'm getting to the stage where I'm becoming a not-bad amateur mechanic.  
Nothing really fazes me now, except circlips (damn those little 
5hits!).  And bodywork.  The art of painting, welding, repair etc 
totally eludes me.  I have a million questions, too many to bother you 
with, but can anyone recommend a good book on the subject?  There are a 
few websites but I couldn't find anything explaining things in the 
technical detail that I am after.

A