Re: whats the best dupont paint for a tractor

Posted by Jerry B on March 28, 2001 at 07:31:31 from (162.114.24.109):

In Reply to: whats the best dupont paint for a tractor posted by JOHN on March 27, 2001 at 15:49:32:

You are wise in choosing DuPont paints.

If you choose to go with Centari Acrlyic enamel, then I would use the hardener for their Chroma One series paints. It works wonders.

You could also go with Chroma One paint. It is a urethane based paint and is about as good as any multi-stage you can buy. It costs more than the Centari but it supposed to provide a longer lasting finish.

Imron is another choice. I have sprayed it some and haven't gotten the hang of it yet. Chroma One sprays better to me.

You could choose to go with the Basecoat-Clearcoat method. The advantage to this is IF you mess up on the color coat, you can wait about 30 minutes or so and sand the run away using 400 grit paper and reapply paint to the affected area and it will blend in perfectly. Be sure to get the proper Base Maker for the temperature in which you are going to paint.

The instructions will tell you to wait about 1 hour or so until the paint is dry before spraying the clear coat. I don't do it that way. I begin spraying the clear as soon as I can rinse out my paint gun. By doing so, the base coat doesn't have time to dry as much and this gives the clear a better chance of adhering to the base coat. Some folks mix clear with the color coat at a ratio of 1 to 1 and use it as the last coat of color before spraying the clear. I haven't done this yet but entend to try it sometime just see what the results will be. I use a lot of 7600S Clear. It works well for me and sprays nicely too.

If you get a run in the clear, don't worry about it. After the paint dries in 24 hours, nib off the run slightly with a paint file or sanding rock, and then sand with 1000 grit paper, 1500 grit and then 2000 grit. If you use a sanding rock you must soak it a few hours in water before use and keep it wet during use. Careful buffing with 3M buffing compound will remove the sanding marks.

In fact you could wet sand the large sheet metal areas using the the 2000 grit and water with a drop of two of detergent in a bucket of water. Besure to use a firm but flexable sanding pad to hold the sandpaper or you will cut grooves in the clear with your fingers. I use precut sandpaper discs in the various grits with my Hutchins DA sander set to run very slowly. This works well but you have to be careful as you can cut too deeply before you know it.

Because you are using a solid color with no metalic content, you really don't have to worry about runs in the paint very much. After the paint dries you can sand out the runs using the afor-mentioned method, buff and be done with it.

One last thing..to help prevent runs when spraying acrylic enamel. Spray a tack coat on the metal first. This coat should be just thick enough to start hiding the primer. Wait about 1 hour or so until the paint is about dry, then spray the second and third coats of paint. The exact time depends on what the temperature and humidity is in your shop and what reducer you are using. (They come in Temp ranges and you should use the one recommended for the temperature of your shop at the time of painting. You can mix and match reducers to speed up or slow down the drying process.)

If you prepare a scrap metal piece with primer just like it would be a part of the finished tractor, you can spray it and use it as your guide for timing when to spray the second and third coats. Some folks lay it flat. I think that is a mistake. Hang or place it verticaly. That way you can tell how thick the paint can get before runs develope. Don't be afraid to touch it with your finger to check conditions, it is just a test piece and touching is what it is for. When the paint sticks to your finger and leaves strings of paint between your fingers and the paint surface, you are ready to start the next coat.

Keep the gun clean on the outside and wipe the gasket off EVERYTIME you open the gun for filling, dumping, ect. This prevents drips from the gun and debris from sticking to the gasket. Chech your spray pattern after every refill and adjust if necassary.

Good luck.

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