Drop Coating Metallic Auto Physique Paint

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Drop coating is a vital talent that each auto physique paint sprayer ought to aspire to grasp. Drop coats are administered over the last part of the spraying course of when metallic paints are used. When utilized to an auto physique panel accurately, drop coats supply full shade protection, excellent metallic content material distribution and a greater paint base that may settle for lacquers with ease.

Making use of Metallic Paint

Drop coating ought to be used with all metallic auto paints. Many paint sprayers apply metallic base coats utilizing the identical strategies with which they apply stable colours, and this can be a widespread error that compromises an in any other case excellent job. Whereas horizontal arm actions are excellent for many stable shade spray jobs, metallic auto physique paint ought to be dropped onto the panel as quickly as primary protection has been achieved, and it’s equally as vital to cross coat the ultimate utility in horizontal and vertical instructions.

Guaranteeing Uniform Paint Protection

Earlier than drop coats might be utilized, the ready automobile panel have to be adequately lined with metallic auto physique paint to assist keep away from primer transparency. As soon as the colour is activated, a full moist coat of paint ought to be sprayed to the floor of the panel. It’s important that every horizontal spraying motion blends into the earlier one to ensure uniform protection and distribution (overlaps of 30% to 40% are excellent). As quickly as a single we coat has been utilized, the auto physique paint have to be left to dry for round 10 minutes. By no means spray a second coat till the primary one has achieved a matte look.

Making use of a Second Coat of Metallic Paint

Personally, I prefer to spray the following coat of paint in a special course to the primary, particularly when the panel has been taken off the automobile. Typically, this is not doable on vertical panels, reminiscent of fenders and doorways, if they’re nonetheless fitted to the automobile so do not be too involved if you’re happier utilizing a typical horizontal spraying sample. The second utility have to be sprayed in an identical method to the primary coat, however attempt to obtain 80% wetness compared to the sooner utility. As soon as extra, the auto physique paint have to be left to dry for round 10 minutes till matte.

Making use of the Drop Coat

If the metallic paint continues to be clear, an extra coat could also be required however this may not be mandatory typically. To spray the precise drop coat, place the spray gun 18 to 24 inches away from the floor of the panel and scale back gun strain by 20% to 30%. Spray the auto physique paint horizontally, shifting the arm slowly throughout the panel so the metallic shade drops (or falls) onto the floor. Keep uniform protection till the spraying course of is full. Recoat the panel from an identical distance immediately, however swap the horizontal actions for a vertical course so the following coat crosses the primary. In addition to guaranteeing even paint protection, crossing the drop coat affords uniform metallic distribution and a superior floor that may settle for lacquer accurately.

Tacking the Drop Coat

Permit the drop coat to dry earlier than visually inspecting the metallic auto physique paint. Test for patches the place protection is perhaps inconsistent and spray an additional drop coat if mandatory. With solvent-based auto physique paint, it’s at all times a good suggestion to run a tack rag over the automobile panel as quickly because the drop coat has dried. Specialist tack rags might be bought for water-based auto physique paint, however it’s preferable to waive the tacking course of as excessive paint build-up can peel again the colour and this will result in irritating rework.

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Source by Paul J. Mitchell