2-3 cans will cover it. I used 4 on my new frame when I first got it but I made sure that it had time to dry and flash off between coats. I also put on a top coat afterwards. I'm not sure I should have but it has not been an issue.For those that have used Eastwood Internal Frame Coating to encapsulate the inside of the frame; how many 14 oz cans (covers 10 sqft) to generously coat the entire frame ?