The Marvin Tilt-Pac does come in pre-primed interior, with aluminum
clad exterior, and that's what we've ordered. We will, of course, need
to paint them once they're in, but that will be a long project. For
more information on the process, see:
http://www.diynetwork.com/diy/he_win...274800,00.html

The Marvin Tilt-Pac site is not very helpful, but here it is:
http://www.marvin.com/products/produ...38D6C46E298CE8

I'll try to remember to post here once the project is done. That may be
several months from now!!