INTRODUCTION:We've had paint blisters and bubbling on our slide trim pieces that started several years ago. Like all these things it only gets worse until someone repairs it. You could take it into a body shop and pitch out between $1200 to $1500 to have someone do the work. It will also mean staying in the yard for several days perhaps. If you full time this can be a real hassle. Certain shops specialize in these repairs and are set up to provide hook-ups which eases the pain. We haven't been near any.
The finest motor coaches in the world. The words don't cost anything, however.
Several weeks ago I decided to tackle this repair myself figuring I could do a reasonable job of it. This article chronicles the procedure I went through and lists the materials I used to deal with the various phases of the repair. It also provides some helpful hints and tips to get things looking properly. This project was difficult and I wouldn't recommend it as an entry level undertaking. If you have any reservations, take it to a body shop. That said, the experienced DIYer can knock this job out, get good results, avoid an inconvenient layover and save some money in the process.
This work is indeed detailed and time consuming. There are many traps to fall into some of which will ruin the job completely. I haven't sprayed auto body paint in many years and I never did any multicolor work so progress was slow. I learned as I went along, fixed mistakes and thought about how to do better the next time around. I have three more trim pieces to paint and the one chronicled here was the first. Not knowing how this would turn out or if it would turn out at all, I started small with just one trim piece. If you have the confidence, doing all the striping at once followed by performing the same tasks on all the pieces would certainly save a lot of time.
As a parking lot auto body exercise I had to deal with sun, wind and temperature swings. One night it even rained. Starting off small and working piece meal just seemed to make the job more manageable for me. This turned out to be a good decision. Luckily I have the time to devote to it so efficiency and speed aren't high priorities.
The Basic Problem:Country Coaches have aluminum, fiberglass, sheet steel and Owens Corning body panels to paint. These materials react in different ways and require special preparations to make them paint ready. Poor metal prep or no metal prep at all dooms a paint job to certain failure as it ages. Examples of this are clear coat being directly sprayed on Owens Corning panels which proceeds to peel off. Check cracking is another common problem and an example of paint failure. Our bus has all these paint problems to a greater or lesser extent. This article, however, covers just the aluminum trim pieces.
Because of how it corrodes, aluminum requires special preparation before painting. The bottom line is Country Coach just didn't bother with putting in the extra effort to do the job properly. Sad but true. Anodizing or chromate coating would have helped avoid these problems. The responsibility for correcting these problems now falls squarely on the shoulders of the owner and his wallet. My vote would be to spend less money on splashy painting patterns, four color artistry and over the top graphics in favor of three colors, reasonable graphics and perfect preparation. In short, I want a paint job that lasts and continues to look nice year after year.
As for aluminum, the slightest crack in the finish which allows water to enter will cause corrosion which continues to spread. Primer can't adhere to this corrosion. Evidence of this condition is small blisters or bubbling of the paint. Left untreated, it progresses to the point where entire shards of paint just come peeling off. There are no quick fixes after the fact either.
Early warning signs of paint problems. Not easy to fix either.
Repair Procedure:Since this is somewhat of a long involved process, I'll outline basic steps here and expand on each in subsequent parts.
- The first thing you'll need to do is remove all the paint
and get down to the raw aluminum.
- Once you have raw aluminum, you'll need to clean off the
oxide followed by applying a chromate coating.
- Spray your primer over the prepared aluminum.
- Spray each of your color coats, pin stripe first.
- Spray the clear coat.
- Fix problems if any occurred.