You can use a primer to thoroughly cover the old color, then apply 1 or 2 coats of the new paint. Paint & primer in one paints are a newer option, which could be ideal for your situation and even shorten the project.
That depends on your project. Some people choose to skip this important step, but they're missing out on some of the benefits paint stripping provides. Both individuals and businesses have situations where they need to paint strip, and removing old paint gives you a fresh start and a more even new coat of paint.
If you are covering a dark colour or a surface that's never been primed or painted, you will need to use an undercoat. It can also provide a better coverage and hiding power than just applying extra top coats.
Without a coat of primer, you're looking at a splotchy paint job. Applying primer prior to painting drywall will give your finished wall an even, clean look.
You cannot paint directly over the top of peeling or blistered paint. Instead, you'll need to remove flaking paint with a palette knife or similar tool. Then, sand down the area to achieve a smooth finish. Apply a suitable primer before you paint.
Sand with fine sandpaper between coats after they dry. Make sure you remove sanding residue before applying additional coats. I recommend three thin coats of paint, but it all depends on the color and consistency. After the final coat of flat paint, sand* lightly with super fine sandpaper.
Start with coarse 80-grit sandpaper in a manual hand sander or power sander. Using enough pressure to remove the paint but not so much that it damages the wood. Move to medium 150-grit abrasive and finish with fine 220-grit, brushing away dust from the surface each time you change paper.
Sugar soap is essential for cleaning the walls before painting them. The more preferred version is the powder rather than the liquid because it has better cleaning properties. Preparing walls before painting them is a crucial step that many people skip, therefore end up with a poorly done job.
KILZ 2 All-Purpose Interior/Exterior Multi-purpose Water-based Wall and Ceiling Primer is a great all-purpose primer at a good price. It can be used indoors or out, and it works especially well on previously painted surfaces; besides drywall, it's effective when applied to interior or exterior wood and masonry.
#60–#80 Grit: Coarse
Sandpaper grit in these low numbers cuts through old paint and rough edges with ease. It can also take off enough wood to shape and round edges. Coarse-grit sandpaper is not recommended for fine details or for edges and corners that you want to keep sharp.
It's almost always better to strip than to sand. To begin with, except in cases where the old finish is flaking off, it's a lot more work to sand than to strip using a paint-and-varnish remover.
You may need an undercoat for wood, but there is no need to apply any primer, as the surface is already painted. If it is not practical to sand down to remove the sheen, an “adhesion” primer like Zinsser B-I-N will help your paint bond to the surface.
180 to 220 Grit Sandpaper: Finer grit sandpaper is great for removing the scratches left by coarser grits on unfinished wood and for lightly sanding between coats of paint. 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.
The main reason people sand between coats of paint is to achieve a perfect, silky smooth layer of paint. For most drywall interior painting projects, sanding is not necessary.
Chances are good your paint needs to dry for 12 to 24 hours before sanding begins. Most of the painters we spoke with like to spray late in the day so they can leave the car in the booth overnight before rolling it out for a rubdown.
On new drywall, you will use 3 coats of the finish material instead of a primer coat plus 2 coats of finish. Most projects where you're going over a previously-painted surface do not require the use of a primer.
Many professional painters use a tinted primer before painting. This is an inexpensive way to bring your walls close to their final intended color before adding the more pricey topcoat.
Actually, yes. Without getting too technical, this basically means that primer is perfect for sealing and smoothing surfaces, hiding stains, and creating a “paint-grabbing” base layer that will ultimately result in an even and long-lasting paint job.
Medium coarse sandpaper is graded between P80 and P180 on the grit level and offers a good level of paint removal, which is less likely to destroy the underlying surface. If your surface is an intricate design, you are better advised to use medium course grade to protect the carved design beneath the paint.
Peeling paint occurs when moisture collects under a painted surface. Moisture enters wood surfaces from the unpainted side, gets absorbed and then dries. This repeated swelling and shrinking of wood causes the paint to pull away from the surface, which results in cracking and peeling paint.
Vinegar, when applied to painted surfaces, actually lifts the paint from the surface and causes it to scrunch up, effectively dissolving the adhesive bond it has with that surface or making it a bit easier for you to remove with a scraper or some steel wool.
Sand It: If the scratch is deep, use 3,000-grit sandpaper — if not, 5,000-grit will be fine. Wrap your sandpaper around a sponge to ensure pressure is even, spray down the area and the sandpaper with soapy water, then start sanding up and down against the grain.
Sanding Your Car's Paint
1,500 grit is a good starting point, though you'll need to be cautious about sanding it off too much. It's better if you have 2,000 grit, at least, as you can then move up and up to 2,500 grit, and the final 3,000 grit for an ultra-fine finishing touch.