Interesting video on Filler over Epoxy vs Bare Metal, Opinions?

I have restored a number of vehicles over the years, and finding rust under filler on bare metal is common. The thing is, I have also found filler that was still in excellent shape with no rust underneath.

This leads me to believe that the rust under the filler is probably due more to bad metal prep prior to applying the filler. The other issue being the metal having holes in it that allows moisture to creep in from the backside. It was common practice back in the day, to put screw holes into the metal to help "hold" the filler.

Here's an example on the bed of this 1962 Chevy pickup:

Bed Left Holes.jpg

You can see some of the rust I haven't removed yet along the top edge.
I ended up cutting that section of metal out and replacing it.
 
dhutton01 said:
I saw a recent episode where they restarted a project that sat in primer for several years. They found rust under the filler applied to bare metal. Was surprised how bad it looked.

Don
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Wasn't that Count's Customs? Had to strip a show car job that had been sitting in the warehouse because it had developed rust over the whole car. I think they even had it blasted again. They had used a rust prep iirc?
 
Slofut said:
Wasn't that Count's Customs? Had to strip a show car job that had been sitting in the warehouse because it had developed rust over the whole car. I think they even had it blasted again. They had used a rust prep iirc?
Click to expand...
No it was Bitchin Rides that I saw.

Don
 
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