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.Aug 11, 2014
Wet-sand the base coat before starting the clear coat. Wet sanding makes the surfaces smoother. … Once the base coat is smooth and clean, start spraying on about three to four layers of clear coat. Do not scuff the base coat beforehand.
The only objective of the first grit used to sand clear coat is to get it completely flat, and nothing else. 600 grit is aggressive enough to sand it flat without doing any damage to the clear coat. Remember, it is plastic, so too coarse of sandpaper can get very difficult to remove scratches from.
We usually recommend not sanding between touch up base color paint, clearcoat, and primer coats. However, if a little dirt lands in the paint you may let the paint dry and sand out the speck. If you’re having an issue with too much texture or getting runs in the paint, you may want to sand.
Dry sand using 180-grit sandpaper to remove rust or surface damage before moving on to a 320-grit paper to remove your previous 180-grit scratches. Whichever method that you decide, follow it up using 400- to 600-grit sandpaper to sand the paint to prep the existing paint surface for the new coatings to be applied.
You need a compound to buff this out, compound buffs out scratches in the paint like 800-grit but you don’t wanna buff over 800-grit since it’s way too coarse. … You need to be careful not to cut through your paint because if you do cut through the clear coat then you’ll have an issue.
Common Sandpaper Grit Sizes
320 to 400 Grit Sandpaper: Very fine grit sandpaper is used for light sanding between coats of finish and to sand metal and other hard surfaces.
Primer is pourus, as long as you let it harden properly and thoroughly dry it afterwards it should be fine, I always wet flat between stages when I’m using rattle cans. Btw I’d go with at least 800-1000 before top coat personally mate. That way you’ll get a really smooth surface ready for basecoat.
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.
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.
Sand lightly with 240-grit sandpaper between coats, then let the last coat dry for at least 24 hours. This is standard practice with any wood finishing job, and is nothing out of the ordinary. That said, sanding bare wood beforehand to create a smooth foundation is key.
If you see any scratches larger than 320-400 scratches (if you can feel them with your hand or finger nail they’re too deep). As you apply your multiple coats of base coat and then clear coat you will see those very minor imperfections disappear so DON’T STRESS!!
|Grit||How It’s Used|
|180 grit||A finer grit used to final sanding and feather edging body filler.|
|320 grit||For final polishing sanding before the primer coat. Also good on spot putty.|
|400 grit||Used for rough sanding primer. Also used for fine sanding spot putty.|
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.
To prepare the damage for repair, the paint will need to be sanded. Use a 1500 to 2500 grit sandpaper or small sanding block to go over the area immediately around the chipped spot. … Sand it until the paint has a uniform look and has lost its glossy shine.
For most types of car paint, you should wait about 15 to 20 minutes between coats. … Also, between primer and paint applications, you should wet sand the vehicle with a 1000 – 1200 grit piece of sandpaper. This will make spraying the vehicle much easier and allow you to use less paint to cover the car.
An electric orbital sander is a great option for a beginner who needs a good tool to sand or polish their car. All you have to do is plug it in, and you’re good to go. Just keep in mind that the vibration that electric sanders give off can be unpleasant.
1000 grit is good to paint over but not good if you are going to try to buff out those scratches. We usually sand up to a 2500 or finer before buffing.
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.
Oil-based gloss does take a while to fully cure but you will always get a build of dust and grit on the surface which make the surface less than perfect. Lightly sanding (and dusting) between coats ensures you get the best possible result.
This grit is generally used for bare wood surfaces. A final sanding with 150-grit paper is commonly recommended for wood surfaces that will be painted; it leaves a little texture, or tooth, to the wood surface for the paint to grip onto.
Depending on the temperature you can probably dry the surface with a towel, allow it to dry for about an hour at 70+ degrees then paint it.
Sanding Rust Off a Car
Scrape away paint chips or rust flakes, use 40-grit sandpaper to remove the rust and then feather the edges with 120-grit sandpaper. Use 220-grit paper to smooth the entire patch and then wipe to remove any sanding dust.
Should you spot any problems, such as small cracks or nail holes, fill them with putty or spackling. Use a paint scraper to remove the excess before it dries, then allow the filler to dry. Sand it smooth with 120-grit sandpaper.
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. Can I wax clear coat paint? – Yes certainly.
Re: Can you spray base coat over clear? You can base over the clear, but only if you havent broke through the clear while scuffing/sanding it. If you did, you may need to put down sealer first. If you dont use sealer, you could and probably will have lifting.
For a clear coat, you can just sand it and paint it right over it. You don’t have to prime it. We’ll be using a piece of sandpaper – 400 grit and the other one is super Assilex sandpaper by Kovax. It’s a Velcro pad but it’s very soft.
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