"The dandyish Armstrong"
Dandyish: Noun
a man who is excessively concerned about his clothes and appearance
I don't think he meets that definition. I know people who do meet that definition and they actually look good. So, he's not a dandy. He's an ill dressed prat who makes his clothes out of mismatched cut offs and can't afford a trip to the hairdresser.
. . . Or is that too judgemental for this day and age?