I'm having hit or miss issues with primer and wanted to see what everyone thought.
Most of the pieces I bought already were alodined or primed so I've yet to need to prime large surfaces, so I'm mostly doing small pieces right now.
My process has been:
Maroon scotch w/ alumi prep, immediate wash and then acetone wipe down, then dry then prime with SEM self etch or the napa.
From the start to finish I wear gloves so not to touch it and the parts are always laid on something clean and oil free.
Most of the time it works fine, the primer dries quickly and within a day is pretty scratch resistant and fine for some of the small interior pieces that will be hidden away.
But on occasion, a small section of it will just bubble up and flake right off.
Latest was a wing rib that had to be replaced. There's about a 2" spot on it that flaked right up and the rest of it is in great shape.
It's happening maybe 25% of the time, so not always. Is it possible the parts need even longer to dry after the acetone or should I use something different? I'm in CA, so pretty much anything with a "ene" is not sold here, including MEK.
I know people have had good luck with the self etch for this type of scenario, don't want to make this about using that or 2 part.
Thanks.
Most of the pieces I bought already were alodined or primed so I've yet to need to prime large surfaces, so I'm mostly doing small pieces right now.
My process has been:
Maroon scotch w/ alumi prep, immediate wash and then acetone wipe down, then dry then prime with SEM self etch or the napa.
From the start to finish I wear gloves so not to touch it and the parts are always laid on something clean and oil free.
Most of the time it works fine, the primer dries quickly and within a day is pretty scratch resistant and fine for some of the small interior pieces that will be hidden away.
But on occasion, a small section of it will just bubble up and flake right off.
Latest was a wing rib that had to be replaced. There's about a 2" spot on it that flaked right up and the rest of it is in great shape.
It's happening maybe 25% of the time, so not always. Is it possible the parts need even longer to dry after the acetone or should I use something different? I'm in CA, so pretty much anything with a "ene" is not sold here, including MEK.
I know people have had good luck with the self etch for this type of scenario, don't want to make this about using that or 2 part.
Thanks.