Epoxy over Filler

[Joe in NY]

I've sealed the bare metal with epoxy and done my filler work. What's the minimum time to let filler cure before touching it up with more epoxy?

 

[Treeslayer]

i think if the filler sands it can be epoxied. i waited over night but probably didnt have to.
i am a newb, some one with more knowledge will be along.

 

[MJM]

I've sealed the bare metal with epoxy and done my filler work. What's the minimum time to let filler cure before touching it up with more epoxy?

45 minutes to an hour before spraying primer is minimum . My personal preference is to wait a day unless temps are in the mid 80's or low 90's. Remember, cooler days and high dew points have longer cure times for filler. So waiting a day is reassurance the filler has cured.

https://www.3m.com/3M/en_US/p/d/b40067471/