Quote:
Originally Posted by Foot Stomper
Epoxy is useless as a high build. It is only intended for bare steel as corrosion resistance. It's not for spraying over any product, let alone body filler or finishing putty.
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Why would you not spray epoxy over filler or putty? Fillers and puttys are porous, epoxies are not. More than likely after sanding filler flat there will be sand throughs of the first coats of epoxy, more epoxy has to be put down over those at a minimum before you can continue to another build primer. In doing so you get the benefit of sealing off the filler from any further moisture or contamination, and can work with a chemical bond on the next round of primer. Im sorry, but the above quote really is bad information. Ive read in multiple places by different manufactures that epoxy over filler is fine, epoxy as a sealer is fine.
Quote:
Originally Posted by Foot Stomper
Anyone who recommends an epoxy primer as a replacement for a high build urethane primer is dead wrong. .
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As far as I can tell no one recommend epoxy as a replacement for urethane, as an alternative yes. There are
some epoxies that can be used to build and block. Depending on the situation epoxy only could be the way to go. If you have a surface that is close to flat and are willing to work with the benefits and draw backs of doing so then it will be a much more durable job in the end by leaving urethane off of it and using epoxy only.