I am not familiar with any silicone based conductive paints. My experience was with solvent-based & metal filled paints.
The metals could be powdered platinum, gold, silver, copper, nickel, stainless, lead, zinc, or carbon.
Platinum and gold were extremely expensive. Only the copper or silver were very useful at low mA levels when applied
very thick with multiple coats. The silver & copper filled epoxies were not nearly as good as the silver/copper paints.
Brushing was more effective than spraying. Consistent results were very difficult to achieve. Connections were easily
broken with slight flexing. Over all none of these products were satisfactory for our project.
However, any of these would have made good RF shielding. But, non-woven carbon-fiber was much lower cost.
marc_is_curious wrote:i came across SMD stencelling/glueing techniques
Solder-paste is an interesting idea.
Have you tried it? How well does it work for you?