We wet sand our primer prior to painting , we've been doing it in this manor for about 40 years and have never had a problem with moisture. Of course we allow the surface to dry well before painting. Wet sandpaper cuts more evenly because the residue from sanding does not collect on on the paper while sanding.
Does primer need to be wet sanded?
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.
How do you wet sand auto primer?
Start by liberally spraying an area a couple of square feet in size with your water-filled spray bottle. Choose your coarsest grit ( 600 if you are sanding primer or bodywork, 800-1000 if you are sanding a finished paint job). Spray the paper itself, then start gently sanding the body of the vehicle.
Do you sand primer wet or dry?
It depends on the primer and IF the area being sanded can be wet sanded without causing problems with filler, masking materials, water being trapped etc. Some primers lend themselves to either wet or dry sanding but if paper loading isn't a problem it can be dry sanded.
How long before you can wet sand primer?
Dries to touch in 20-30 minutes and is fully dry in 1 hour . When dry, surface can be immediately recoated, top coated, or wet sanded. For best results, allow to Primer to dry for 1 hour before dry sanding.
What grit sandpaper should I use on primer?
600 grit and 800 grit are used for sanding imperfections in the primer before applying the base coat/paint. Start with 600 grit and work your way up to 800 grit. You can use 1,000 grit or 1,200 grit over the base coat to remove imperfections. It is important to use “wet sanding” technique.
Do you sand primer before basecoat?
All you have to do really is, scuff down the clear coat with 400-grit then you can lay your base coat and clear coat right on top of that. You don't even have to put any primer on it.
Can you wet sand high build primer?
Usually if I use the high build primer, I use it first, block with 180 and then re prime with some Primer Surfacer instead of the Primer Filler, then wet sand with a paint stick and 400 grit . 400 Grit will work fine for primer and you won't have to worry about sand scratches in paint.
Is wet sanding better than dry sanding?
Wet sanding, which is sanding with the addition of water to act as a lubricant, is less abrasive than dry sanding , and results in a smoother finish. It's best to wet-sand the final finish of a project. Dry sanding removes more material, and smooths rough material quickly.
Do I have to sand after priming car?
It may be necessary to sand down your car again after the primer is dried . Many times applying the primer can cause mounds or dips in areas and you want to smooth these out as much as possible. Only use fine grain sandpaper for the primer as you do not want to sand off the primer.
How long do you have to wait between priming and painting?
In most cases, latex primers don't take more than an hour to dry out. However, you should wait three to four hours before applying a layer of paint. On the other hand, an oil-based primer will need a longer time to dry out. You should give it 24 hours to make sure that it's completely ready for another coat.
How do you clean primer after sanding?
Re: cleaning primer after sanding? Swamperca Wrote: Quote: Just tack rag and blow it off . If you have not wiped your grubby fingers all over it, just wet or dry rubbed, I agree with just tack rag and blow off, but in the reverse order.
What happens if you dont sand primer?
Summary. For your finish to be vibrant and not dull sanding after primer will ensure that the finish is not excessively dulled when you apply your paint top coat . You will typically use finer grit sandpaper and aim to achieve a smooth wood finish so that you get a fine appearing wood finish when you apply your topcoat.
Can you wet sand basecoat before clear?
Wet-sand the base coat before starting the clear coat . Wet sanding makes the surfaces smoother. ... If you wet-sand the base coat, wash the vehicle with soap and water after this step, not before. Once the base coat is smooth and clean, start spraying on about three to four layers of clear coat.
Should I wet sand after clear coat?
The clear coat should be wet-sanded with 400 grit sandpaper . ... The sanding steps help diminish the clear coat until the entire surface is smooth. The polishing helps smooth out the scratches made by the sandpaper. Sanding can be a time consuming process, so plan to spend some time on this step.
How long should 2K primer dry before sanding?
2-5 minutes flash between coats, depending on temperature. Drying Full cure in 12 hours at 68°F . IR Drying: 35-40 minutes at 140°F After 20-30 minutes / 68°F (20°C) recoatable wet-in-wet If recoated after 24 hours, the 2K Epoxy Primer Filler has to be sanded first. Wet sanding with P800, dry sanding with P400.
