I think you're being too hard on yourself - the degree of weathering looks fine to my eye. As for the RAM, looks like you got the shape right (try making one in 1/700 if you want to drive yourself nuts) - just remember there are two, portside forward and starboardside aft, which I messed up on my Enterprise build. My only comment, and this is in the "insane detail" level, is that I believe there are 21 missiles in each launcher, so 21 holes. BUT - at that scale, who's gonna know? I say go with them as is!
And here are a few more pics: http://www.globalsecurity.org/military/systems/munitions/ram-pics.htm