[jb92563]

Its good to document failures as well so we can avoid the techniques that did not work.
If someone else had documented their experience with this product you probably would have been successful on your first try.

What was the product you used?

A few things came to mind and after a googling of Powder-coating since I know nothing about it, but am curious and would like to add it to my repertoire of projects skills.

Did you check the oven temp with a thermometer of some type.
I found out that my oven at home reads 20F higher than actual. Our last thankgiving turnkey had some slightly raw areas, which prompted me to check afterwards with a infrared thermometer.

I also read that electrostatic powder coating ensures better end results.

There are also different kinds of Thermo Plastic, each suited to specific materials and application techniques.

I didn't realize that powder coating is actually just a thermo plastic that is deposited on the underlying material.