Primer is the final step in filling small imperfections and light sand scratches. It has some limitations though. If you put it on thicker than Recommended, it will shrink later. The sand scratches that you thought were filled will show up in your finished paint job.
Using a high-quality primer provides many benefits, including hiding imperfections and promoting adhesion.
A proper solvent based primer, like tamyia or mr hobby for example, will hide imperfections (as long as they aren't massive gaps, or large raised areas). This is actually part of the job of primer (the other part is giving paint something to bond to). You can get a bottle of Tamyia surfacer, and brush it over.
Primer is meant to fill small scratch marks by doing as Peegoo said. Repeat until all are gone.
Filler primers are used to fill in imperfections in a surface. The filler primer prevents the finished top coat from looking unsmooth and having uneven surfaces. Coach Enamel primer generally contains a rust inhibiting element, it fills pores in the bare metal and protects bare ferrous metal surfaces.
Applying a makeup primer helps to smooth the look of the complexion and provides a flattering, blurring effect that bends and bounces light when it hits the skin. Primer can help to reduce the look of wrinkles, but it won't fill them in, as such.
Autobody filler is (basically) made of a vinyl ester or a polyester type resin. Epoxy primer is (basically) made of an epoxy type resin. If you were to bond/glass over a metal pad to a fiberglass boat, vinyl ester or polyester is never used, epoxy is.
Fill any cracks that have opened, and the prep coat and paint will likely disguise any fractured hairline cracks. It would be best to apply two coats of the Dulux 1-Step primer to ensure a decent chance of covering the cracks.
Dupli-Color® Filler Primer features a high build automotive formulation capable of filling deep scratches and minor surface imperfections. A fast-drying, sandable finish allows for easy feather edging while providing a smooth and rust resistant surface that promotes top coat uniformity.
HOW LONG DOES IT TAKE FOR PRIMER TO DRY? Most latex primers dry to the touch in 30 minutes to one hour. But for best results, don't paint until the primer completely dries—which can take up to 3 hours, depending on temperature and humidity. Once the primer is completely dry, it's prime time for painting.
Flat paint, with its velvety, matte appearance, is the best choice for hiding any wall imperfections due to its lack of shine and reflective properties.
Original Kilz Primer allowed more seep through when put in two coats to two different walls in the same area, whereas Zinsser provided superior coverage.
There is actually no harm in using a good primer prior to painting a wood surface. A primer is going to help fill out any imperfections and ensure that the paint does not soak in deeply.
Smooth Finish: No one wants bumpy, patchy walls. PVA drywall primer smooths out inconsistencies in texture, making the final result look silky smooth.
Can you paint over primer without sanding the car? Technically, yes, you can do that. Some circumstances don't require sanding the existing paint and primer before repainting. If you choose this route, the car's surface might show minimal damage like puncture holes, body scratches, dents, and cracks.
Paint Entire Wall
A cohesive appearance can be provided through a complete paint job to the surface of the wall. Painting the entire wall is an important step in hiding spackle spots.
What Does Paint Primer Do? Covers imperfections such as areas of your wall that may have been patched or repaired. Blocks and conceals stains so they don't bleed through your newly painted finish.
Primer is the final step in filling small imperfections and light sand scratches. It has some limitations though. If you put it on thicker than Recommended, it will shrink later. The sand scratches that you thought were filled will show up in your finished paint job.
Rust-Oleum® Filler Primer is a hi-build formula that fills in minor imperfections in the surface and improves topcoat adhesion and appearance. Use on metal, wood and fiberglass surfaces. Do not use on surfaces that will come in direct contact with heat or high temperatures such as mufflers or exhaust components.
Rust-Oleum Zinsser Peel Stop Triple Thick Binding Primer may either be applied lightly for basic priming and sealing, or followed with several thick coats to bridge and fill cracked and uneven surfaces. This primer does need to be back brushed or rolled to work the product into cracks and edges of the old paint.
BEDEC Interior-Flex is an elastomeric matt emulsion paint formulated to coat interior ceilings and walls. Interior-Flex is a unique product designed to bridge hairline cracks and flex with the substrate where movement causes cracking with conventional matt emulsion.
KILZ OVER ARMOR® Textured Coating is a lightly-textured, solid color coating designed to bridge cracks, hide imperfections and give a uniform look to old, weathered wood. KILZ OVER ARMOR Textured Coating can also be used over cracked and weathered concrete. Available in a variety of “wood stain” and “concrete” colors.
The best stain-blocking primer depends on the surface and the stains you need to block. Oil-based stain killers work the best on water stains and for spot-priming. Latex stain-blocking primers work better on large areas and hold up better on exterior surfaces.
In essence, while there might be exceptions, it's typically a wise choice to follow the “silent rule” and use an additional primer over your etch primer. This extra layer of protection ensures your paint job remains beautiful and long-lasting.
Most wall fillers dry white, so you can paint over it with either a primer or sealer if there is a stark contrast to the rest of the wall when fully dried. Or paint your colour directly over it.