Drop coating is an crucial skill that every single auto system paint sprayer need to aspire to learn. Drop coats are administered in the course of the very last stage of the spraying system when metallic paints are used. When utilized to an automobile overall body panel the right way, drop coats supply full color protection, fantastic metallic content material distribution and a much better paint base that can settle for lacquers with simplicity.
Applying Metallic Paint
Drop coating must be applied with all metallic automobile paints. Many paint sprayers apply metallic foundation coats applying the similar techniques with which they use sound hues, and this is a prevalent mistake that compromises an normally ideal career. Even though horizontal arm movements are perfect for most reliable coloration spray employment, metallic automobile body paint ought to be dropped onto the panel as soon as simple protection has been obtained, and it is equally as vital to cross coat the closing application in horizontal and vertical instructions.
Making sure Uniform Paint Protection
Right before fall coats can be applied, the prepared auto panel have to be adequately lined with metallic automobile body paint to support steer clear of primer transparency. At the time the color is activated, a comprehensive wet coat of paint should be sprayed to the surface of the panel. It is necessary that every single horizontal spraying motion blends into the previous a single to warranty uniform coverage and distribution (overlaps of 30% to 40% are great). As quickly as a solitary we coat has been applied, the vehicle human body paint should be left to dry for around 10 minutes. Under no circumstances spray a next coat right until the initially just one has achieved a matte visual appeal.
Making use of a 2nd Coat of Metallic Paint
Individually, I like to spray the future coat of paint in a different course to the 1st, particularly when the panel has been taken off the vehicle. From time to time, this is just not achievable on vertical panels, this kind of as fenders and doors, if they are still fitted to the vehicle so really don’t be far too involved if you are happier using a typical horizontal spraying pattern. The 2nd application should be sprayed in a very similar manner to the to start with coat, but try to achieve 80% wetness in comparison to the before software. Once more, the vehicle system paint must be left to dry for about 10 minutes till matte.
Applying the Fall Coat
If the metallic paint is however transparent, an further coat could be needed but this will not be essential in most circumstances. To spray the real fall coat, position the spray gun 18 to 24 inches away from the surface area of the panel and lower gun tension by 20% to 30%. Spray the automobile overall body paint horizontally, relocating the arm slowly but surely across the panel so the metallic coloration drops (or falls) on to the surface area. Keep uniform coverage until eventually the spraying procedure is total. Recoat the panel from a equivalent distance straight absent, but swap the horizontal movements for a vertical way so the subsequent coat crosses the first. As very well as guaranteeing even paint coverage, crossing the drop coat presents uniform metal distribution and a excellent floor that will take lacquer appropriately.
Tacking the Fall Coat
Enable the drop coat to dry in advance of visually inspecting the metallic automobile overall body paint. Verify for patches where by protection may be inconsistent and spray a further more drop coat if necessary. With solvent-dependent auto physique paint, it is generally a fantastic concept to run a tack rag over the auto panel as before long as the drop coat has dried. Professional tack rags can be bought for water-primarily based auto physique paint, but it is preferable to waive the tacking course of action as substantial paint build-up can peel back again the shade and this can guide to disheartening rework.
