I use rustoleum paint for predator traps. I will not put speed dip on a predator trap.

I use Speed dip for water traps and it works well.

Speed dip should be used diluted thinner than they recommend. 1:6 dip to coleman fuel and dip on a LOW humidity day with a warm breeze. Otherwise, it will never set and be sticky. You read some bad reviews and they likely did it wrong when they used it...

these are speed dipped
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painted coyote traps
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good link about speed dipping.
http://www.trapperman.com/forum/ubbthreads.php/topics/3894425/1

dye and wax works, but I find it to be a pain and expensive to do it right (propane and wax cost) and it takes forever. Wax also soaks up smells...not a good thing for a coyote trap.

Dakota dip works for snares but is garbage for traps

never used full metal jacket so I can't comment on it