"I need painting on fifty's aluminum siding, have the chalking, and got the information I needed to substantiate the techniques I believed would have to be done ahead of I look for any contractors."..." additional DM Dave Marshall "Most helpful: how To make sure It is aluminum, what grit sandpaper http://messiahonjgd.post-blogs.com/12489315/an-unbiased-view-of-aluminum-siding-primer