Manifold to downpipe gasket + sealant?

V12-Engine
1

I’m about to reassemble after spotting a cracked manifold. I’ve got a new one obvs and have everything clean and ready to put back together.

2 questions:-

first - is it a good idea to use “maniseal” or similar on the downpipe donuts?

second- unlike the jag sixes, the v12 has steel nuts on the head-manifold studs instead of brass. Is there any reason not to use brass ones?

2

I would always use a schmear of red RTV on the donuts, and I think bronze nets would be a good idea.