I purchased the Chrysler "RB" turquoise engine paint and activator for a new motor I am putting together for my son's '72 Charger. The paint and activator worked perfectly, with excellent coverage. Once the paint was cured it was hard as nails, and cleans up perfectly after engine lube spills, etc. Most engine paint I have used in the past did not use a hardener and was subject to loss of gloss and binding power when fuels or oil spilled on it. This stuff is HARD! Additionally, the activator caused the paint to cure even in a cool shop (applied around 60 degrees). I recommend the use of the activator with the Eastwood engine paints.