Rattle Primer Issue

[agirard7a]

SEM self etch primer is the best in my experience. Adheres very well.
I use a cleaner/degreaser sold by my local autobody
Supply store. By the way SEM or (NAPA not as good) will not prevent
Rusting on steel. Epoxy primer on steel parts or high wear areas.

[amaris]

Originally Posted by wirejock

There's some sort of contaminant causing the bubbles.
Try scrubbing with Bon Ami cleanser then a thorough rinse, dry and spray.

I was under the impression from reading about the alumiprep, but I thought that would also help remove any contaminants. Does it not?

[amaris]

Originally Posted by agirard7a

SEM self etch primer is the best in my experience. Adheres very well.
I use a cleaner/degreaser sold by my local autobody
Supply store. By the way SEM or (NAPA not as good) will not prevent
Rusting on steel. Epoxy primer on steel parts or high wear areas.

I did some tests with SEM, Napa and Sherwin and liked the SEM the best because it was cheaper than Sherwin and held up better than Napa.

[amaris]

Okay, I'll ask one more general question.

How do you guys handle big pieces like one of the wing skins? I haven't found a tub wide enough yet to fit it.

[az_gila]

Originally Posted by amaris

I was under the impression from reading about the alumiprep, but I thought that would also help remove any contaminants. Does it not?

It's basically an acid with soap added...

The soapy bits/etched-off-remnants still need to be removed.

[terrye]

Originally Posted by amaris

Okay, I'll ask one more general question.

How do you guys handle big pieces like one of the wing skins? I haven't found a tub wide enough yet to fit it.

I found the crate that the wings came in (top removed) was just about the right size. I lined the crate with poly sheet from Home Depot, made a drain in one corner, mounted it on sawhorses, and poured in the Alumiprep. Cleaned the parts, drained the Alumiprep, rinsed the tank, filled the tank with Alodine, treated the parts, rinsed them, drained the tank, and rinsed the tank.

[N804RV]

I always thought Alumaprep was a "re"-conditioner, for dirty, oxidized aluminum in which the Alclad was compromised.

With new-condition Alclad aluminum, is it really necessary?