Baked In Enchantments

I'm trying to replicate the "Baked In Enchantments" feature of the mod Quark.

If you are not familiar, Quark makes all golden tools automatically have the Fortune 2 effect, but without actually being enchanted. This allows you to still use an Enchanting Table to add enchantments to the tool.

Now, I've easily been able to add a given enchantment to a tool when it is crafted, but since this enchants the tool, it cannot be used in an enchanting table to receive more enchants. Any help on how to apply the effect of an enchantment would be greatly appreciated.