Jeb would you mind sharing your prep work before you use the VHF,I am interested in other coatings beside Duro coat and cero coat for my clients.How has the finish held up to in the field ? Do you use a media blaster, and if you do what type of grit? I hope you don't mind all the ?.?.?? But I am learning and want to do a good job. Thank you Mtn Jack