For some of the really thin fiddly bits that i just know will snap, i have used a small amount of thin super glue on them before clipping off the sprue. There are assembly instructions on the wyrd site for a lot of the models, check under downloads i think.
For primer, i have used some of the army painter sprays without too much detail loss. I recommend taking one of the torakage and use as a test model with your usual primer to see how it turns out. Also, there is a fb group, a wyrd place, that you should join. You'll get a lot of suggestions for stuff like this if you post there.