I wouldnt recommend it. It doesnt stick well and ends up scraping/flaking off. Buddy of mine did an entire bed and it looked great for about a week. Ended up costing him more when he had a shop do the real thing because it took them so much longer to clean and prep before they coated.
I scuffed my toolbox with a red scotch brite pad then a good wipe down with wax and grease remover . Been on there all year in the Florida sun and still looks good . Just don't do one heavy coat , use 3 or 4 thin coats .
When we did spray liners. Permatech. We would use a zinc coating sprayed on and let it dry. Then spray the bed liner on. This was the shop I worked at and we had zero issues or returns for them not sticking.
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