If you was planning on painting your a-arms "today", but dont know how or what to do then you might not get them done today. Theres alot of posts on painting all over this forum, just look them up. No its not too hard to take off and put on the A-arms, especially if you done it before. I think first time i took off my A-arms it took about 45 minutes. I think i could have all four off now in about 20 minutes.
To prep my a arms i wired wheeled what i could and fine grit sanded the rest, then applied paint. But that was a temp fix until this winter.