I want to spray paint my pizza oven door. What should I use?

After you remove the handles and screws -

Thoroughly clean the entire door on both sides - remove ALL grease, smoke, soot…

Once the door is super-clean, use fine grain sandpaper to remove any existing powdercoat paint. Remove as much as you can.

Using a clean rag soaked in Alcohol or Acetone, clean the door (prep for painting).

Once you are ready to paint, make sure you select a HIGH-TEMPERATURE SPRAY PAINT. Don’t rush spraying the door - it will be a 2 or 3 day process as multiple thin layers of paint are much better than 1 or 2 heavy layers of paint.

FYI - A good black paint that is not too glossy or too flat / matte is Rustoleum blend 241169.