I'd pass. The downside of coming in with your supplies all weighed, mixed and ready to go is it just reinforces the misconception of how easy candlemaking is. And then that undermines the price of your candles sitting right there on the shelf. If this was a craft supply house paying you an appropriate fee it might be a different story. Or if you had supplies to sell. But generally speaking I don't think a gift shop that sells on consignment should be asking a consignee to come in and demonstrate how to make their product. For heaven's sake, most of the shops here have signs posted about not taking pictures, much less asking for demonstrations. However, we do have one local consignment owner who does request the occasional demo hoping to increase foot traffic in her shop. Thing is, she never, ever demonstrates her own products. Says it's because customers have already seen enough of her. Yeah, right. :rolleyes2 But if I did do it, it would totally include the business end of it - how much I have invested, the ongoing testing process, the frustration of losing a supplier, etc. I'd also come armed with more than a few examples of poorly wicked candles. Show 'em the mess and dangers of a blowout on a pillar, the waste of a tunneled candle, a blackened jar. Light a deliberately overwicked container and let 'em see a torch in action. Tell 'em about some of the tricks used to deceive buyers like only scenting the top of the candle or placing a drop of FO on the bottom of the lid. And then, of course, have a properly wicked candle there burning for comparison. Your shop owner would be getting a whole lot more than she bargained for