I am building an iron fence for the first time and hope someone can help with a couple of questions I have. The fence is to go around a pool. First question is the iron I bought is covered in a black oily substance and i was wondering what the best way to clean it before painting is and if I should clean it before or after I put it up. the second question is if anyone has any good ideas for hinges and latches for the gates. The code is to have self closing and latching gates. I am building the fence out of 1.5 X 1.5 upper and lower rails with .75 in risers and 2 X 2 posts. all steel is .120 thick. I have attatched some pictures of what I have done so far. the table I made out of some aluminum wire rails that I got for free. thanks for any input you have. By the way I am using a mm210.