Arbitrum NFTs & Ethereum: Questions on bridging, storage & more

Hello!

I own a couple of NFTs on Arbitrum and intend to mint more NFTs on Arbitrum as well.

Going forward, I still have a couple of open questions:

1. Is it possible to bridge Arbitrum NFTs to the Ethereum main layer? If yes, will those NFTs still be "Arbitrum" NFTs - or Ethereum NFTs? What are other implications of bridging (e.g. are they still stored on IPFS)? Still can't wrap my head around it.
2. If yes, is there an Arbitrum NFT bridge to Ethereum, similar to what Polygon offers https://bridge.mintnft.today/
3. Can you recommend marketplaces that allow minting of new NFTs on Arbitrum?

If you have any hints or could point me to useful resources, I would really appreciate that!

thank you!