@BedsOfPurple said
"I've seen two contradictory opinions on whether to cover talismans and magick weapons. I've read authors that say you should always wrap up/cover your talismans and magick weapons when you banish lest they lose their charge of astral energy. I've read other authors who say the opposite that unless your specifically intend to cleanse your implements of any charge they are safe and don't need to be covered. Any opinions or advice?"
Cover, unless you want to give subconsciousness the message that your magick is ineffective.
But you left out another variation, especially in the case of 'weapons' - You use the newly consecrated implement to do the banishing! It is, therefore, not "at effect" of the ritual. It also completes and confirms its authority over the powers you need to banish, fortified by your will.
"It seems the Golden Dawn believed that talisman are charged with astral energy which brings forth the effect. I believe in Regardie's Golden Dawn book one of the knowledge lectures states one should not create more than four talismans lest you totally deplete your energy. This line of thought has always been my working model."
The above would only apply to etheric energy, not astral energy. But, in general, don't use your energy. Use purely divine energy, brought down through the Worlds to Assiah.