Once you have prepared the area I would then undercoat, and give it a light sanding with a fine grade paper to get a good bond for the gloss to stick to. This way you will get a first class finish.
In this post
Do you need to sand between undercoat and gloss?
Two layers of undercoat should cover any darker paint finishes underneath and also helps to build a better base for the gloss coat. Leave the second undercoat to dry for 24 hours and then rub it down all over with 400-grade wet and dry paper (used dry) wrapped around a sanding block.
Should you sand between undercoat and top coat?
So if the penultimate coat is good you might be OK without sanding, but sanding does provide something for the final coat to bind to if the previous coat was applied some time ago, so ultimately it will provide a more durable finish.
Do you need to sand primer before glossing?
Previous Coat is Glossy
Paints do not stick well to glossy surfaces, whether already painted or not. Whether it’s a wall or woodwork, it should be thoroughly sanded to provide a surface “key”. You may need an undercoat for wood, but there is no need to apply any primer, as the surface is already painted.
Do I need to sand in between coats of paint?
Pro tip: Sanding between coats of paint isn’t always necessary, but is highly recommended when applying polyurethane over stain or raw wood.
Is it best to use undercoat before glossing?
5 Answers from MyBuilder Painters & Decorators
first treat the knotts then use a primer/undercoat 2 coats is best then top coat of gloss. if painting wood that is already painted you can just rubb it down a little then gloss if you are using a good gloss but of course one coat of undercoat would be best first.
How many coats of undercoat do you need for bare wood?
two coats
On bare wood, two coats are usually enough. The topcoat—whether gloss, satin or eggshell finish–adds texture rather than colour, so add a third layer of undercoat for full coverage if needed. Alternatively, combined primer undercoat paints are available – you’ll need three or four coats.
How long after undercoating can you gloss?
Yes, it’s okay to wait 5-6 days before applying the top coat.
Should I sand after priming?
Do I need to sand primer before painting? The goal of a primer is to stick to the surface and close any and all holes that could allow for mold growth, protecting the material itself and its surface. Old primers already in place hinder this effect and therefore to ensure a uniform layer, older coats should be sanded.
Does undercoat have to be perfect?
The primer coat doesn’t have to be perfect, but it should cover the surface (no bare spots) and it shouldn’t be so blotchy that you get drips or visible unevenness.
What grit sandpaper should I use between coats of paint?
180 to 220 Grit Sandpaper
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.
What happens if you don’t undercoat gloss?
It will just peel in the future if you don’t prepare the surface you are painting on. To prepare you usually have to add a primer, sand, undercoat, or some or all of these things depending on the surface underneath.
How can I paint gloss without brush marks?
Load the brush with your gloss paint and wipe away any excess, then begin painting very gently and lightly in long strokes to achieve one final coat with the gloss and avoid brush marks.
Do you need to sand gloss paint before repainting?
Can You Paint Over a Glossy Surface Without Sanding? Yes, you can paint over a high gloss without sanding. Start by cleaning the glossy surface with sugar soap and water. Once it’s completely dry, scuff it with a de-glosser and let it dry for at least 10 minutes.
Can I do 2 coats of undercoat?
Two primer coats are recommended in this scenario because much of the first primer coat will be soaked up by the wall; the second coat will replenish any primer absorbed by the surface and hide any flaws in the wall.
What happens if you use undercoat instead of primer?
Decorators often use the terms interchangeably but in simple terms, an undercoat is always a primer, but a primer is not always an undercoat. Although similar, both serve quite different functions. Primers act as a foundation for your paint to stick to while undercoats create a flat and level base for topcoats.
Can I just use undercoat on bare wood?
An undercoat and gloss coat should be sufficient. If it is bare wood then a primer would be needed for best results.”
How long should I leave undercoat to dry?
Primer (aka Undercoat)
Use latex primer under latex paint; while it may be dry to the touch in just 30 minutes, wait a good 3 hours before proceeding with paint. Use oil-based primer under oil-based paint, and give that all-important primer coat 24 hours to fully dry.
Can I paint a second coat a week later?
Adding a Second Coat
After your first coat of paint is dry, it’s safe to recoat typically after four to six hours. A good rule of thumb is to wait at least three hours to recoat your paint or primer if it’s water-based. Waiting 24 hours is best for oil-based paint and primer.
What happens if you recoat paint too soon?
Applying a Second Coat Too Soon
You can ruin your entire paint job by not allowing enough time for the first layer of paint to dry before adding a second coat. Check the instructions on your paint can for a suggested dry time, and if you’re still unsure, give it 24 hours.
Is it OK to put 2 coats of primer?
Depending on how strong or bold the previous color is, it may be necessary to apply more than one coat of primer. However, it is not necessary to over apply the primer with so many coats. As long as the primer applies uniformly over the previous color, then one or two coats should be sufficient.