How much thicker? Somewhere in the 10-15 mm range, even higher with graphics. So on one hand, choosing between refinish and custom paint is a matter of simple color preference. On the other hand, since custom paint systems are designed to work at higher builds, they are usually the better choice if you're doing graphics or custom effects. Note that we said system here; these paints need to be used with the appropriate primers and clears. "The primer system we recommend when we build a skyscraper gives us max mechanical anchoring," observes Lynch. And just as you need the right material underneath all that paint, you need the correct clear over it. Refinish clear, applied liberally, measures around 3 mm; doubling that, according to Lynch, would be way out of spec. This can keep the clear from curing completely. Clear designed for use with custom paints creates a more stable film at high build-important when you're clearing over flames or graphics-and it provides the additional UV screeners needed to protect the exotic colorants used in custom colors. Both are critical to paint longevity. Whichever type of paint you decide to use, you have to use the proper supporting materials with it.
4 Things To Pay Attention To, From Jeff Matauch, PPG Training Center Instructor
Safety
"Whatever you use, there is no safe paint. Protect yourself by using a respirator, spray suit, and gloves, and always promote fresh airflow in your painting area."
Equipment
"Nine out of 10 times there's a problem, it's the equipment, and the first thing is always the compressor." You can buy a $600 paint gun, but if your compressor doesn't put out, it's all for naught. "A typical HVLP gun needs 15-18 cfm air pressure, and a compressor creates 3-4 cfm per horsepower. That means a 5hp compressor is borderline. The size of the air lines is critical-you should use 3/8-inch hose and high-flow air fittings for better volume. And air filters are a must.
Wrong Product For Job
You have to put the right type of solvent or reducer in your paint. "Anytime you use a solvent, you have to choose the correct grade based on the temperature you are spraying at." If you use a solvent that makes the paint dry too quickly, for instance, it can skin over, trapping solvents underneath. This can cause problems like dieback (dulling) or solvent pop (blisters). "You can go on our site and get a description and mixing directions for any of our product lines. It takes the guesswork out."
Waterborne Paint
Use of waterborne paint will be mandatory in parts of California starting this July. So what, you say? Well, as the Golden State goes on environmental issues, so goes the rest of the country, eventually. Some painters think it's the end of the world; most are at least concerned. "My confidence is high, and I'd have no problem spraying it now." Waterborne paint is more consistent and stable, since there are no solvents to settle out. "It's easier to spray, the metallic control is better, and it's more durable." And, of course, it's more user-friendly.