Category Archives: clearcoat

Slow Going

Between the weather, which has continued hot and humid with afternoon showers, and the persistent flecks and patches of clearcoat (which have to be removed with dabs of Strypeeze), the polishing is quite a project. As you can see, the top areas I have completed look pretty good. They will next get a pass with a finer polish which should remove most of the swirls and cloudy areas. Of course, I realized the other day that the two replaced panels in back did not have clearcoat, and seem to be a slightly different aluminum. They will polish up but not as shiny but who really cares?

You can see the contrast between the polished and unpolished areas here on the panel just above the buffer.

One thing this project has stimulated is my planning for this winter’s trip. I’m reviewing the dozens of campground where we have stayed and lidting the good ones, with sites we like, and also have a “never again list by states.

We’ve had a cold front come through so polishing should be a bit more bearable. It’s fun to chalk off one more section, but there’s always more ahead. Fortunately, we are in no big hurry.

 

Stripping Between Showers

We are, like most of the East, in a humid spell where days finish with showers and thunderstorms — and the air is heavy and Maryland-like. It’s not great painting weather but OK for stripping clearcoat — as long as I get five or six hours between application and rain.

I am using a new safer stripper that I bought from Vintage Trailer Supply. Here’s part of whart they say about it:

For many years, vintage Airstream owners have relied on RemovAll 220 peroxid-activated paint stripper to remove the plasticoat from their trailers before polishing. RemovAll is no longer available in North America. Fortunately, PPG Aerospace makes a paint stripper based on the same principles as RemovAll. It is called Eldorado PR-5044.

PR-5044 is a peroxide-activated paint and primer remover. It works well because it is designed for removal of polyurethane and epoxy paint systems in the aerospace industry. PR-5044 is environmentally preferred and worker-friendly. It does contain petroleum distillates, so it does produce fumes. You will need to read all safety information before using. However, it is not a hazardous material and is much easier to use and safer than traditional aircraft strippers.

So, it looks like vanilla pudding and paints on rather easily. Here is the first panel I tried it on:

That worked out pretty well so the next day, I applied it on the upper section.

After a thundershower rinsed it, I spent some time with water and rags removing the coating which tended to come off like Saran wrap. At times, whole sections several square feet in size just peeled off — other areas were more stubborn. Some will require more stripper.

The removed coating looks like cellophane and will be easy to clean up later on.

So, the upper right side is 95% done and after a break for the 4th, I’ll start on the lower. It’s slow going but I just realized, after talking with my brother, that the two new panels we had replaced are coating free. I figure I have about 14 hours in and another 20 to go – before beginning to polish.

The upper right side is about done – now to start on the decals and lower section.

 

Meeting Mr. Filiform

I have decided to tackle the peeling clearcoat on the Airstream on a casual basis – a panel or two at a time. So today I continued to use up the Stypeeze on some lower panels. I found that the top half came off fast – I could hear the covering crinkling up as I applied stripper below. The lower half was much tougher- I wonder if they put two layers down nearer the road.

stripped clearcoat
The clearcoat comes off pretty well after 15-20 minutes using water and a rag (and protective gloves.)

As I have cleared off areas, I am noting areas of so-called filiform. Filiform corrosion on Airstream happens at the cut edges, rivet holes, scratches, and fittings from moisture and ocean or winter road salt begins at the unprotected aluminum at those areas and spreads under the clear coat finish, where it flourishes because it cannot dry out easily. Various owners handle it differently – some ignore it, some try to recover it with clear lacquer, others wax the heck out of it.

filiform on edge
Here is some filiform along a seam.
filiform along rivet holes
filiform forms around rivets as well.

In doing some online research, I found that a combination of wet sandpaper and then polishing is the way to go. I only had 400 grit sandpaper (I need 800, 1000 as well) so I tried a couple of test spots. Here’s how it looks — not sure it is better but it is nearly gone.

I purchased a gallon of stripper from Steve at Vintage Trailer Supply and will start using that next week. It promises to be easier on the user.

I read somewhere that it takes 200 hours to polish an Airstream the first time. I may do half this year and the rest next. So it might look a little strange – hey, get over it!

 

Airstream Dermatology

It’s well known that the clear coat used on Airstream exteriors weakens and starts peeling after UV exposure. Some say it starts in five or six years, others seem to do a little better. We had a little peeling when we bought the Safari five years ago but it has gotten steadily worse. It is just cosmetic but as we consider options, I know that potential buyers won’t be too impressed. Here’s what it looked like from the front.

The clear coat and Airstream name was looking pretty ratty.

I decided to strip the clearcoat and polish the aluminum on the top front where the situation was the worst. Steve at Vintage Trailer Supply recommends an environmentally-safe stripper and I’ll use that down the road, but I had an expensive gallon of brain-frying Strypeeze so I used that. At least it was outdoors and with purple nitrile gloves, I painted it on the panel. It looked like this.

The Strypeeze wrinkled up the clearcoat, which then could be wiped off.

After several applications of stripper, I hit it with some lacquer thinner and got most of the remnants off. The peeled areas are oxidized and so the whole panel needs to be polished. That’s next week’s task once the heavy rains scheduled here soon subside.

The non-oxidized areas look pretty good giving me hope for good polishing results.

I have the feeling that this is going to turn into a major project, but at least it doesn’t all have to be done this summer. The softer aluminum used in later Airstreams doesn’t shine up like the older ones, but it should look fine. We will see.