Seeing how your the enamel paint Guru, are all enamel hardeners the same? In Canada we can't buy Valspar or Majic, After quite a search the only product I could find in the country is available through Offshore body parts and is called ProForm Wet Look.
YUP, That's basically the same as all the rest. It'll be just fine for our application. 2oz per quart. Mix every 10 mins for 30 mins then apply. Only mix what you can use in 8hrs cuz after that the Paint is NO GOOD!!!