[Melodica-Me]

Alan, I used the spray can ” very light coats” this stuff is thick. You need to check for either oil base or water base. I used the water based on the enamel spray paint and worked fine. The key is to let the Kilz dry completely, it will sand like chalkiness a Tac cloth and then spray you first coat lightly sand and repeat. I am not sure if it will work with acrylics. Definately try on a piece of plastic before you hit the melodica.
Hope this helps
Melodica-Me