Jet Spray
MASTER Aerosols

Aerosol Finishing Tips

Surface Preparation
The surface being sprayed must be clean, dry and smooth. Sand any repair area smooth with #400 Wet or Dry finishing paper. It is most important to remove all traces of wax, oil, and dirt (which may retard drying) from the surface.

Finish Application
There are a few basic rules to follow to achieve good results when applying a finish. Failure to observe these rules can result in finishing problems.

1. For best results, all aerosol spraying should be done at room temperatures of 70° F. The can and piece being finished should be stored overnight in a warm room to insure good results. When taking a can from a cold area for immediate use, warm under hot water (no more than 120° F.) for 5 to 10 minutes. If the aerosol is too cold the can pressure will be low and the finish will not spray properly.

2. Aerosol product performance depends on thorough mixing of the contents before and during use. Shake the can vigorously up and down until the agitator balls inside are loose. If the can has been standing on a shelf for a long time, it may be necessary to tap the can on a firm object with the bottom rim of the can to loosen the agitator balls. Once the agitator balls are loose, swirl the can in a circular motion, which will mix the pigment around the bottom rim, for about one minute.

3. Never spray in a drafty area as drafts may deflect the spray causing overspray over a large area.

4. Where ever possible have the object laying flat to prevent runs and sags.

5. Always depress the spray head completely for proper atomization. Partially depressing the head can result in droplets forming and ending up in the work area. For large jobs, use a Spray Can Handle to eliminate finger fatigue.

6. Hold spray can 10 to 12 inches from area being finished. Keep your fingertip away from the front of the spray head as droplets may form which may be blown into the finish causing specs.

Holding the can too close to the finishing surface can trap the propellant causing small bubbles to appear in the final finish. When you spray from too long a distance, you may end up with a rough overspray or 'sandpaper' finish because the solvent will dry before the complete spray hits the surface.

Proper Spraying pattern
The best method when spraying is to start from the front #1 and work towards the back #5. Never spray continuously. All aerosol spraying calls for short bursts, stop at the end of each stroke. Always start the new stroke off the piece moving onto the area being finished. This method eliminates overspray or puddling of material. Best results are obtained with several light coats in both directions as opposed to one heavy coat.

Keep Your Aerosol Products Clean
Always keep the spray head and dip tube clean upon completion of each finishing operation. After you have completed your work turn the can upside down and depress tip (as shown in illustration) for a few seconds until only vapor appears. This will clean the spray head and dip tube. Wipe off all overspray from head before you put the can away. Clogged sprayheads can be removed and soaked in lacquer thinner. Never leave spray cans any length of time with spray head removed as the sealing gasket will expand making insertion of a spray head at a later date difficult. Use a small thin knife to clean the slot in the bottom of the spray head. Inserting a fine needle intothe orifice of the head as shown in illustration will help clean clogged sprayheads.

Aerosol products should never be stored in an area where temperature may exceed 120° F.
Keep out of direct sunlight, trunks and rear window ledges of automobiles.

Safety Precautions
Most paint and lacquer products in aerosols are flammable. Never spray in basements or any room that has an open flame or gas fired appliances. Always spray in a well ventilated area for safety and health reasons.

Shelf Life
Storage: cool, away from heat. Aerosol products should be used within 12 months from the date of purchase. Prolonged storage in areas where the temperature changes can break down the sealing gasket causing the propellant to escape slowly making the can inoperative.

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available from: Wood Finish Supply