RE: Advice on Airbrushes
Chinito 03,
For what it's worth there are a few tricks that will help with successful spray painting.
1. Submerge the can of paint in warm water before spraying. Make sure the water is not hot! Hot water can cause too much expansion in the can and create a dangerous amount of internal pressure, which in turn could cause the can to explode. But if you submerge the can in warm water then take it out and shake it frequently you will get much better results. Should take 15-20 minutes in the warm water, and shake the can for about 45-60 seconds at least 5-6 times during that 20 minute period. The warm water will warm the paint, making it less viscous and shaking it will get the agitator moving inside to do it's job. Between the heat and agitator the paint becomes more evenly suspended in the carrier fluid (solvents) which means it will flow much more easily, as well as lay down in a smooth level surface.
2. Don't spray the paint too thick. Several light coats is ALWAYS better than one heavy coat. In fact it's best to start with 2-3 light mist coats that almost appear to be be rough and not completely cover the underlying plastic. These light mist coats give "tooth" or something for the later coats of paint to stick to. Once you have applied several mist coats, then go ahead and spray on several heavier "wet" coats. These wet coats of paint will stick to the tooth coat you applied previously. Using this method also ensure a nice smooth and even finish with good adhesion.
3. As with any successful paint job (rattle can, airbrush, or brush) prep is paramount. Make sure all of the parts you are painting are clean and dry. If you don't have a purpose made plastic prep you can use rubbing alcohol as a good alternative to remove dirt, dust, and skin oils. If you have metal parts use a decent metal primer before adding the final color coat.
I hope this helps, but if you have questions or need clarification let me know!
Streetsquid