I’ve generated a new OpenPGP key, and I’m now using this new key.

See my migration message for details.

Anyway if you are using my repository and get the following error:

W: GPG error: http://silicone.homelinux.org unstable Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 8B306538D00E52B6

All you have to do is to get the new key and import it to apt again.
The key is stored as before in siliconerepositorykey.asc and you can import it with:

sudo apt-key add siliconerepositorykey.asc