42: There is a famous Tosfos (I think in Niddah) that, in response to the possibility of saying Cherev Harei Hu K’chalal by Tumas Kohanim, R’ Chaim HaKohen says, “Eizeh Hu Bayis Asher Tivnu Li”. Any metal utensil that was in an Ohel HaMeis would then be Assur for a Kohen to be in an Ohel with. This is brought down in the Nosei Keilim in Hilchos Aveilus (don’t remember exactly where).
HaLeiVi: The Rambam says any Goy can be M’vatel an A”Z. The word “Ovdeha” (which is what I assume you are referring to) does not appear in most Girsaos of the Rambam and doesn’t make sense because it contradicts what the Rambam says a few Perakim later. I guess it would be very Achronish to try and be M’chalek between a Goy Oved Avodah Zarah and a Stam Goy, but that’s untenable because the Rambam holds that, from our perspective, all Goyim are Ovdei Avodah Zarah (because he says we can’t be M’kabel Ger Toshav anymore so there is no way for an AKU”M to get rid of his Chezkas Oveid Avodah Zarah).