SURFACE PREPARATION

1. If possible, use a heated substrate between 150 and 200C [300-400 F] for spraying water-based coatings. Air-spraying a water-based coating onto a heated surface will lead to immediate drying, such that the coating goes down like if using an aerosol can.

2. A roughened substrate improves adherence.

3. Clean the substrate very well!!

AIR-SPRAYING

1. Use the attached recommended spray equipment. If other equipment is preferred, be sure to use a pressure feed system since a siphon feed system will not allow most paints to be sprayed properly due to their viscous nature.

2. Avoid heavy spray coats. A 2 to 4 mil layer is ideal. Build up the thickness slowly to avoid running.

3. Use short bursts rather than a continuous spray. This allows maximum control during spraying.

4. Maintain a distance of at least 6 to 12 inches from the substrate to permit uniform coating. Too close of a position with the spray gun causes too heavy of a coating.

5. Maintain proper gun and tank air pressure. To high or too low pressure causes spotting of the coating; when these are not correct, the paint sprays as small blobs rather than a mist.

6. Use a sweeping motion for the gun and change the spray angle often in order to cover all pores, crevices, etc. Do not hold in one spot while spraying. Start the spray while not directed at the substrate when possible. Air guns often shoot out a heavy stream in the beginning until the correct air/coating mix is achieved.

7. Adjust the spray cone angle for the best coverage using the gun adjustments.

8. Always clean the equipment after use.
 

SAFETY NOTES

Use appropriate safety equipment. Refer to the Material Safety sheets for details.