Clear coat should be allowed to harden for at least 24 hours before attempting to use a buffer. In most cases, you will be trying to remove “orange peel” when buffing a new paint job.Mar 31, 2016
Allow 5-10 minutes between coats. After allowing approximately 24 hours dry time, It may been polished by hand or machine.
Some professionals advise that you wait for about 24 hours or largely through the night. Well, the idea is so the wet coat has sufficient time to dry and take it course before wet sanding. Also, caution is equally important during the wet sanding process.
As mentioned, leave acrylic for as long as possible before sanding. I’d tend to leave 2 pack for at least 3 days before sanding/compounding (especially for a home job that hasn’t been baked). For 2K I’d definitely get onto it within 2 weeks though.
As a clear coat protects your car, you need to wax it regularly. Indeed, the shine of a clear coat requires a few layers of waxing, but ultimately you need to wet sand it for regaining the original texture. Wet sanding and buffing clear coat also helps to minimize and eliminate orange peel on the clear coat.
You need 2 coats with one being for UV protection and the second for longevity and again, a third so you can sand & buff it if needed. I guess my coats are on the heavy side since I spray until the clear looks like how want the finish job to look.
600 grit wet is fine for recoating the clear, I’d stay away from the scuff pad if possible because the scratch it leaves isn’t as even as sandpaper. The overall job looks pretty good so a good cut and buff should produce a nice paint job.
The bad news is, you can’t just sand for adhesion and respray clear coat. … You can sand for adhesion and spray a new coat of clear over the base, but it will never lock in, and it will always sit on top of the old clear at the edges. The new clear coat will never be as strong as the original and will fail much quicker.
You can buff without sanding but you won’t remove much texture, it’s common in a collision shop to just denib any dirt spots by spot sanding then buff the panel to make the shine uniform.
You can sand 2k paint, cellulose and water base although the base coat is only water based the lacquer is still 2k.
You need to wet sand clear coats with very fine sandpaper. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. While it is soaking, apply masking tape to areas you don’t want to sand, such as moldings and panel edges. Remove the sandpaper from the water and wrap it around a sanding block.
When using a single-stage paint that has a chemical hardener, you will probably need to wait only 24 hours or so before sanding. The hardener allows the paint to dry faster and more crisply, so sanding will be more effective earlier on in the process.
You should paint over 400-grit. That is an excellent grit to paint your base coat and clear coat over, including enamels or anything else that you’re doing. You can actually go even more coarser if you’re doing a single stage enamel. Some people even paint over 280 grit-sanded surfaces.
Clearcoat Spray Paint
Allow 30 minutes after base coat color has been applied to apply the clear coat. Apply 4-5 wet (but not dripping) coats waiting 10+ minutes in between coats. Each coat should be dry to the touch (not tacky) before moving on to the next.
Wet sanding is the most aggressive form of paint correction and removes severe clear coat damage. Compound is used remove moderate clear coat damage, and hazing left behind by wet sanding.
You can use their 1k clear over either of those, and then use the 2k Spraymax or Shopline 2k clear over it after cure and wet sand. Thanks Yamahawk, I am using Duplicolor enamel paint and Spraymax 2K i will let the paint sit for at least a week before i spray the clear.
Mix the paint: 2 parts paint, 1 part 2K Hardener then add 10% 2K Thinner to volume, this may vary depending on spray gun setup and air supply. Apply a cover coat of 2K paint, leave for 10-15 minutes, depending on conditions.
Adding a small percentage of reducer will thin out your clearcoat, making it easier to atomize and give it a better flow while its drying out.
When spraying base coat clear coat systems, you want to spray at 26-29 PSI. You measure this PSI by pulling the trigger and letting air flow through the tip of your gun with your dial or digital readout saying 26-29 PSI.
– Clear coat can be applied over existing clear coat, as long as it is good condition. … Urethane clears bond to the base coat while it is still drying. Spraying clear over base after more than 24 hours have passed is not recommended.
Start by sanding away the old clear coat. Once the old clear coat is removed, you can reapply a new clear coat. If you need to blend in the old clear coat with the new one, lightly sand the area and polish your car like new.
Base coats usually go on in 2-4 coats until the entire surface is fully covered with no primer showing through. After that you will apply 3 or more coats of clear coat and you will see the clear coat actually cover AND fill those minor imperfections in the surface.
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