➀ The article discusses the challenges of using carbon-based paints for conductive applications, comparing them to the popular and expensive Bare Conductive paint. The author mentions the difficulty of finding a suitable carbon-based paint with the right consistency.➁ It explores the possibility of creating a custom conductive paste or paint that can be adjusted for stickiness and viscosity.➂ The article highlights the advantages of using a machine to apply conductive paint and assemble PCBs without manual soldering, which is beneficial for rapid prototyping.➃ It mentions alternative methods for solderless assembly, such as laser-cut parts and wire joining techniques.