Thank you everyone for your help! Emily, I read your blog and you have waaaay more patience than I do.
Here in northwestern Pennsylvania, a lot of homes have the new style metal roofs, since acid rain turns shingles ugly. I wanted my dollhouse to have that type of roof, since I'm not sure I'm ready to do shingles. I trimmed off a small strip and tried two test paint spots using Behrs interior acrylic. It seems to cover ok, but I can scrape it off with a fingernail, so we will see. Like I said, hubby wants to try the Krylon for plastic.
I did send an email to Model Builders Supply, and received this reply:
"Just as the directions say, use acrylic paint to paint, if you are weathering it then paint in stages going from light colours to dark letting each coat dry in between. For glueing we recommend MBS GLOOP, but if that is not readily available, you can use panel adhesive being careful to make sure you leave a few minutes from the time you apply the adhesive to the time you press in place."
Once again, thank you for helping this newbie!!