DupliColor Self Etching Primer

[818 AV8R]

yes they are putting primer on the new C-182... and charging FOUR HUNDRED THOUSAND DOLLARS TOO.... lol

[RV7AJeremy]

Probably won't apply to too many people but advanced auto parts gives a 10% military discount. Every little bit helps.

[mculver]

Some of the NAPA stores in my area have 7220 on sale for $5.99 right now. Check in your area -- they seem to do this on a regular basis, but not at every store. www.napaonline.com is an easy way to comparison shop between stores.

A year ago it was $5.49, so not quite certain why they raised the price by 50 cents in a no-inflation environment...

Originally Posted by longranger

Wow! I may have drive off the mountain and find a Walmart! Yesterday I felt like I was getting to the point on my empennage that I'm going to have to make a primer decision. I found out last week that I can no longer get my tried and true Variprime here, so I went to our local NAPA store yesterday to pick up a couple cans of 7220 just to get started, and all they carry is the Duplicolor. But... it was $9.49 - over $10/can out the door!, so I just bought one can for a trial run. They can order the 7220, but it's about $0.50 MORE per can. The price difference wouldn't sway me but if the Duplicolor works as well, and it's available off the shelf, that's the way I may go.

[krw5927]

Thanks for the heads-up on 7220 being on sale, Mike! Just ordered some more.

[cattflight]

Originally Posted by mculver

Some of the NAPA stores in my area have 7220 on sale for $5.99 right now. Check in your area -- they seem to do this on a regular basis, but not at every store. www.napaonline.com is an easy way to comparison shop between stores.

A year ago it was $5.49, so not quite certain why they raised the price by 50 cents in a no-inflation environment...

Yikes! I just checked NAPA online and they are saying $10.69/can. What am I missing?

[f14av8r]

Hi Everyone,
I'm new and still in the planning / lurking stage. I must admit I'm very confused by the whole priming question.

Why would ANYBODY go through all the pain of the Alumiprep 33 / Alodine 1201 multiple step cleaning, washing and priming with a spray gun process if simply spraying the parts with Duplicolor, SW 928, NAPA 7220, et al from a rattle can will suffice?

As I'm trying to make up my mind about tackling this project, one of the things I don't think I'll like is having to prime all the parts. Especially when lots of folks say priming isn't necessary at all!

Is the rattle can approach a good middle ground? Not as good as the multi-step processes but better than not priming at all?

Finally, what prep process do you all use for rattle can priming? I think I've gathered you still have to clean up the surface. Is roughing it up and cleaning it with a solvent adequate?

Thanks for all the great info so far!

[xavierm]

Originally Posted by f14av8r

Hi Everyone,
I'm new and still in the planning / lurking stage. I must admit I'm very confused by the whole priming question.

The best way is whatever you decide. You can review the many never ending debates in the forums about priming vs no priming. Pick one that you are most comfortable with.

As far as self etch primer, I clean with denatured alcohol and a scotch-brite pad, let dry, then spray the part.

[longranger]

Originally Posted by f14av8r

Hi Everyone,
I'm new and still in the planning / lurking stage. I must admit I'm very confused by the whole priming question.

Why would ANYBODY go through all the pain of the Alumiprep 33 / Alodine 1201 multiple step cleaning, washing and priming with a spray gun process if simply spraying the parts with Duplicolor, SW 928, NAPA 7220, et al from a rattle can will suffice?

As I'm trying to make up my mind about tackling this project, one of the things I don't think I'll like is having to prime all the parts. Especially when lots of folks say priming isn't necessary at all!

Is the rattle can approach a good middle ground? Not as good as the multi-step processes but better than not priming at all?

Finally, what prep process do you all use for rattle can priming? I think I've gathered you still have to clean up the surface. Is roughing it up and cleaning it with a solvent adequate?

Thanks for all the great info so far!

At the very minimum, you'll need to prime the non-alclad parts. As for priming the alclad parts, my un-primed 57-yo C-170 built with the same alclad metal RV's are built from spent the first 42 years in the humid southeastern US, a good portion of that outside, and is doing just fine, though there are examples of those that haven't.

I'm currently just priming mating surfaces with Duplicolor. My prep is scotchbrite and solvent wipe, (or scotchbrite and Dawn diswashing soap for the bigger jobs, since I've started a concerted effort to decrease my exposure to solvents).

The biggest drawback with Duplicolor is that it takes a day (longer if it's cold) for it to bond to the metal. It dries to the touch in minutes but doesn't bond well to the metal for quite some time. I prime before I dimple, and if I dimple to soon, the primer literally falls out of the dimple. I used to use DuPont VariPrime (no longer available in California) and it was pretty much good to go as soon as it dries.

By reading this forum, you're on the right track. Set your display options to "From the Beginning", and spend a few more days reading.