I've finished the Terminators from the Black Reach set. The only thing I did with them was give one a spare heavy flamer. The models are pretty good despite being basic "clip together" starter set minis - they're totally compatible with the standard Terminator box sets although they're a little less dynamic.
I spray varnished these models to get rid of the shine on the decal and instead got a light white dusting all over them when the varnish dried. I'm damn annoyed about it but there's not a huge amount I can do about it apart from buy some new varnish - it's a little old and I think it's been sitting around too long. Even though I gave it a good shaking, I suspect the matt medium has separated from the carrier liquid.