Tyranid Trygon/Mawloc

After magnetizing all my Tyranid Warrior weapon options and seeing how well that turned out, I've started thinking about magnetizing other things. When I put together my new Trygon, I decided I might as well use some magnets. There aren't really different options that can be switched out, aside from the different tail variants and different sized arms. You can't switch between a Trygon and Mawloc, but I thought that magnetizing the arms and tails would give me more variety. Also, magnetizing the two body sections together, and also the head, would make it much easier to store and transport.

Shrine of The Aquila

I have assembled my Warhammer 40,000 Shrine of The Aquila terrain kit. I think it turned out pretty well. After assembling it I attached it to a base. You'll want to make sure the pieces are sitting on a completely flat surface when you glue them together, otherwise they'll end up crooked and not sit flat on the base. I glued some leftover pieces, cut up sprue, and small ballast to the base as rubble.

I basecoated the whole thing in black, and then sprayed a coat of grey, trying not to completely cover everything so that a little of the black showed through. This gives it a bit of a textured look. Here are some pictures.

Having never painted a building before, I'm now realizing that I have no idea of how to go about it. Does anyone out there have any suggestions? Should I get a really big brush and a bigthing of light grey paint and give the whole thing a dry brush? Should I make all the beams, rivets, and floor pieces a metallic color, or leave them grey? I'll do the details like the lamps and tubing at the end, but I'm not sure where to begin.