You use words: "not delivered yet" which would suggest you have quilted for someone else and then
"I joined the guild to grow my business". Both these suggest neither are your quilts but rather a show and tell would almost be like an advertisement for your business. The suggestion to ask the guild about their policy is to me necessary. Many guilds have associate members who are in the "business" where advertising might be possible, otherwise to suggest using show and tell to "grow one's business" is to me not appropriate.