If the paint does NOT come off, it is oil-based paint and you will need to prime the surface with a bonding primer before applying latex paint. The primer can be latex, but it has to be a product that is made to prepare the surface and help with adhesion and that says “bonding” on the label.
Shellac Primers - These primers can be used with both oil-based and latex paints and may be the best at blocking stains and can even seal in smells that may be coming from the surface you are painting. They are fast-drying and can adhere to almost any surface.
Acrylic/Latex paint will not adhere to oil based paint, unless you sand it down or use a latex primer that is 100% acrylic and has high adhesion. Or you can use an oil primer and then 48 hours later paint over that with a latex paint.
For optimal paint adhesion, cover the oil-based paint with a high-quality primer such as those listed below. If any color or stains show through, apply a second coat of primer.
Using fine sandpaper, between 180 and 220 grit, rub away the glossy top coat of the oil-based paint. This will help the new primer and water-based or latex paint adhere to the surface without cracking or peeling. Remember, you do not want to sand away all the paint - just the glossy surface.
It is recommended you always use a primer before embarking on a painting job. For best results use an oil-based primer if your top coat is oil based paint, or latex based primer if your top coat is latex-based paint.
If you have various stains, shellac Bonding primer is the ideal choice. It can be used to cover rough surfaces and old varnish as well as metal and ceramic.
If the paint does NOT come off, it is oil-based paint and you will need to prime the surface with a bonding primer before applying latex paint. The primer can be latex, but it has to be a product that is made to prepare the surface and help with adhesion and that says “bonding” on the label.
Some suggest GAC products, but you can also simply use acrylic gesso which is less expensive than the GAC products. If you love using lead oil primer then simply add that over the acrylic gesso. As long as the canvas is sealed you can put any oil product on it – primer or paint.
Use on interior and exterior surfaces including woodwork, drywall, plaster, paneling, masonry, brick, painted metal and properly prepared glossy surfaces†. Use under or over water-based or oil-based paints.
Covering with water-based paint: You can't paint over oil-based paint with water-based paint directly, but you can after some crucial prep. Doing the correct prep: Always sand the glossy surface of oil-based paint before applying water-based paint. This step ensures better adhesion and a smooth finish.
High Exposure to Sunlight. Exposure to intense sunlight makes oil-based paints vulnerable to cracking. Elastic and latex paints tend to contract and expand when exposed to direct sunlight, which weakens their adhesive bonds.
In conclusion, while it's possible to apply latex paint over oil-based primer, it requires proper surface preparation and the use of a latex primer. Never apply oil-based paint over a latex surface, as it will not adhere properly.
Here's How To Do It. A question we get asked often is, “Can you paint latex over oil?" The answer is “yes”.
This all-purpose water-based undercoat primer-sealer can be used over or under any oil-based or water-based paint and is ideal for new construction and remodeling.
Oil-based primers and paints have been an industry standard for decades. These primers work with both oil paints and latex paints, making them very versatile and applicable to a wide variety of surfaces.
Apply one to two coats of an oil-or water-based bonding primer and dry according to product directions. You'll know the surface is adequately primed when the former paint color, stains, and other surface imperfections are no longer visible.
Primer for Make-up:
Create a smooth canvas by using olive oil as a makeup primer. It helps your makeup last longer while adding a healthy radiance to your skin.
A premium all-purpose alkyd primer, undercoater and stain-blocking sealer for vertical and horizontal surfaces, this oil-based primer delivers a mildew-resistant coating, superior tannin-blocking, four-hour recoat and excellent hide.
You can paint older oil-based paint without sanding, but it's not always the best idea. If the oil-based primer or paint is in good condition, you may be able to get away with just painting over it. However, if the paint is starting to chip or peel, you need to sand it down before painting over it.
Latex paints will not stick to oil based paints. The exception is that an oil based primer may accept any kind of top coat paint. For that reason, an oil based primer is recommended to be applied over any oil based top coat, then a water based paint may be used as a top coat.
Trisodium phosphate, also known as TSP, is a powder you mix with warm water and use to wipe down your walls before painting. It is an essential step to paint preparation, acting in three ways to improve your paint's overall look and adhesiveness.
Alkyd Primer
This is an oil-based primer used as an undercoat on steel, wood and aluminium surfaces, most suitable for oil paintings. We sell two types of Alkyd primers: Robersons Thixotropic Alkyd Primer - this is a multi purpose primer for all types of oil painting.
Interior | Exterior Primer. KILZ® ADHESION Primer is a water-base, modified-acrylic primer specifically formulated to bond to a variety of 'tough-to-paint' surfaces.
A 'bond coat' primer that's great for hard-to-stick surfaces, it offers excellent adhesion without sanding. Bulls Eye® 1-2-3 also prevents rust formation when applied over clean ferrous metal such as iron and steel.