Where in Socal are you? ...there are many FX supply houses that sell alternatives to permawet. V-Gloss is basically the same thing ..a shiny sealer..sold at Nigels in North Hollywood. Maybe be a bit more specific with the card board question ..what exactly are you trying to do? there might be other solutions. As for the LED question ..anywhere you can drill a hole, you can probably install lights. Ask Predtrhuntr if he has any LED kits left ...