Maybe I'm a bit slow but how would work on a sandblasted frame as a primary coating? Was thinking POR 15 since the frame will be clean but this might be a good option. Also thought about the coating used on my 2005 Chevy Silverado 3500 but I've seen some rusted Chevy frames. My pkup is stored most of the time with 40,000 miles on the clock so it's all pristine condition and maybe not a good reference to use for their coating. Think it's a wax base coating. Sounds similar to the Woolwax you mentioned. Thanks.