I did this:
M-x customize-variable RET org-export-latex-classes RET
and changed the LaTeX header for article to this here:
\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{longtable}
% BEGIN My Article Defaults
\input{/
Evening all,
I have a question about how people use the latex exporter if I may, I
can't find much on the interweb about it. How do you go about tarting
up the output? The exporter creates 99% of what I want, but the margins
are daft and I'd prefer a different font. I'm guessing you hand craft