I started working on getting the airbox cleaned up and painted. Began with the airbox cover and decided to give VHT's Wrinkle Plus paint a try to give the lid the "original crinkle coat. I picked it up at Advanced Auto Parts. After some experimenting, I am happy with the result.
According to the directions on the can, I sanded the lid down to the bare metal. The original coat was hard to get off so I used a dremel tool with a sandpaper drum to get it to the bare metal. This was followed up with a hand sanding using 400 and 800 grit sandpaper. The directions state to not use primer and give it 3 heavy coats in alternating directions with a 5 minute break between coats. I put the lid in the oven at 200 degrees for 1 hour. This was too much and the crinkle was too heavy especially along the bottom of the lip.
After the first attempt, I scraped and sanded the lid down to the bare metal again. This time I gave it one coat of primer and let that dry. I followed this up with two lighter coats alternating the directions and waiting 5 minutes between coats. I put the lid in the oven at 200 degrees for 1 hour. This worked much better and the crinkle was more controlled. The lid needed more texture still, so I gave it 1 more light coat and did not bake it.