Paint shows everything, down to the finest detail. In fact, they usually show up even worse than before. Paint will show down to about grit sanding scratches, which is why most paint jobs are taken to or grit before the base color is sprayed.
If the old paint is peeling bad clear coat, etc or checked little cracks all over , then you need to strip it completely. Bad paint under new paint will always show though and eventually those same issues will come back with a vengeance.
If you are going to paint a car, you will be doing a lot of sanding, this fact must be accepted. If the existing paint is in good shape, it can usually be prepared with a fine Scotch-Brite pad. This is essentially a soft grit pad that is used to give the existing paint a rough surface to grab onto.
Body work and primer needs to be block sanded to a minimum of grit, and grit is best. Do not sand the body higher than grit, as the paint needs some roughness to lock onto. See Surface Quality tip for chips and scratches. The most common reason for a new paint job is for body damage repair. Chances are, the damage has set for a while and your body has some rust. Even the smallest amount of surface rust can ruin an otherwise excellent paint job.
Once it starts, rust continues its slow march eating into the metal of your car. Kill the rust now, before anything else is done. Light surface rust can be handled with sanding, but heavier rust requires rust killer or complete replacement. Spray-on rust killers do work, but you want to let them cure for 48 hours before doing any work on top of them. Paint needs primer, in all cases. You cannot spray paint over anything else and expect it look good or even stick to the car.
When preparing a body for paint, there are several primer coats. Bare metal large panels need etching primer or epoxy primer. This stage gets scuffed for filler primer or surfacer , which is a heavier primer that is designed to go on a little thicker and get block sanded. This is for filling sanding scratches, not dents, dings or chips. This is the stage after major body work is done.
The car gets block sanded, primed again, and block sanded again. Preparing an automobile for painting involves a lot of careful specialized work. If possible, work in a well-ventilated open area. Paint thinner and automotive primer give off powerful fumes that could make you lightheaded if applied in an enclosed space. You Might Also Like How to. How to. More References Auto Technician. Expert Interview. About This Article. Co-authored by:.
Co-authors: 3. Updated: July 28, Deutsch: Ein Auto auf neuen Lack vorbereiten. Bahasa Indonesia: Menyiapkan Mobil untuk Dicat. Thanks to all authors for creating a page that has been read 90, times. I put 20 coats of clear coat on it and it turned out great. My very first paint job took about 3 hours to do everything. More reader stories Hide reader stories. Did this article help you?
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Ulasan ini adalah spam. Berita Otomotif. Panduan Pembeli. The moisture separator will ensure that you have a dry air supply moisture in your air supply is an easy way to ruin a paint job. Another option is a turbine paint system, such as the 5 Stage Turbine. It does not require an air compressor, and ensures that you have a dry air supply.
There are two general paint gun designs: HVLP gravity-feed and siphon-feed. Gravity-feed guns have the cup mounted on top of the gun, and siphon-feed guns have the cup mounted under the gun. Due to environmental rules these days, most paints are formulated to spray with a HVLP gun, and luckily for home users many of these spray just fine with a smaller home compressor. For more on types of spray guns, check out this expert blog post on the Eastwood blog.
In addition to the spraying equipment, you'll also need safety equipment like painter's coveralls , an approved respirator , goggles, and disposable nitrile gloves. For a much more comprehensive explanation of painting safety gear, click here. How Much to Take Apart When deciding to paint your vehicle, how much will you take the vehicle apart?
Are you going to remove the hood, trunk, doors, glass, etc. Taking everything off allows you to make sure there's no hidden damage, and it allows you to get paint into nooks and crannies. However, you'll have to deal with gapping the panels, reinstalling glass, replacing seals, etc. If you decide to paint the vehicle while it's still together, remove as many of the small parts as you can: antennae, door handles, lights, locks, wipers, etc.
If you're leaving parts on the car that are not going to be painted, be sure to use high-quality automotive masking tape and masking paper Tip: to get paint under installed seals, take some nylon clothesline or coated wire and put it under the seal, and then mask off the seal.
This will lift the seal enough to allow paint to spray between the seal and the body of the vehicle. Do you plan on stripping the vehicle to bare metal, or painting over the existing finish? Stripping the vehicle to bare metal allows you to see what is hiding under the paint: rust, body filler, shoddy repairs, and other damage. Bare metal also allows you to know exactly what products are being used. If you paint over an existing finish perfectly acceptable for some applications , you never really know what's hiding under the surface.
Also, if this old finish was not properly prepped, your new coating may flake off due to the existing finish flaking off. If you don't know the history of the finish on the vehicle, it's generally a better idea to strip it to bare metal and start fresh.
When painting over an existing finish, the finish must be in good shape. Faded finishes are okay, but should not be peeling, cracked, or otherwise damaged.
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