Re: Featherfill high build primer
The problem as I see it is you are using the wrong product. K36 is an epoxy sealer (which you don't need) and a surfacer. Always remember epoxy primers do not sand well at all. (They tend to ball up.) IMO what you need to be using Omni's MP282. If it is more money than you want to spend, consider Evercoat's Slick-Sand.
You do not need to seal the metal if you are going to use a top-coat. Epoxies are for sealing the metal that won't be painted, --or an unstable substrate such as a BC/CC where you have sanded through part of the CC and have surfacer beside BC and CC surounding it all.
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