I have some Pam so will try. I see mineral oil mentioned here elsewhere. Know it's not motor oil. Is it for health aid? Also could you tell me what is coroplast, Robo? Is it key that the background be white? Thank you both for your input.
You can buy mineral oil in the pharmacy, it is used as a laxative. Coroplast is like plastic corrugated cardboard. It is used a lot around here for temporary advertisements on street corners (big sales, going out of business, election signs). I usually stock up the day after election days