Preparation is the key to any successful painting project. 
Begin by removing as much furniture as possible from the room. Use drop cloths to cover the floor and any remaining furniture. While plastic is ideal for furniture, canvas drop cloths absorb paint, are not slippery, will not move, and can be
reused.

Next, remove any pictures, mirrors, window treatments, and electrical/light switch plates. Loosen the ceiling plates of hanging light fixtures and cover the fixtures. Because surface dirt can cause poor adhesion, use a light detergent to wash surfaces that are soiled, that are touched often, or that may have any oily residue from cooking. Take care not to leave any residue from the detergent. Wash doors and trim, particularly where they are handled. After they are clean, wipe surfaces with a damp cloth and allow them to dry before painting.

Pen, Crayon, and Water Stains
Use a liquid detergent to remove as much of the markings left by pens, crayons, and water stains as possible, and wipe with clean water.

Glossy Surfaces and Imperfections
To ensure proper adhesion, sand glossy surfaces with fine sandpaper. Be sure to remove sanding dust. Vacuum surfaces clean and wipe with a tack cloth. Examine floor, wall, and ceiling surfaces for nail holes, cracks, or any other surface imperfections. Use a putty knife to rake out any large plaster cracks or loose particles in your walls and ceilings.

Spackling
Firmly press spackling compound into crevices with a putty knife and smooth until the compound is flush with the surface. To fill mitered trim joining (which are open) and door or window trim that is separated from your wall, press the compound into the crevices, and smooth it with your finger. Allow it to dry and then sand lightly. Because patching compound shrinks when it dries, it is often necessary to apply the compound a second time after the first coat has dried

Loose Paint
Use a putty knife to remove any loose or scaling paint. When you remove paint from walls or ceilings, sand paint edges to ensure a smooth surface. This will marry the two levels of paint so the edges will not be noticed when it is re-coated. When removing paint from the sash, trim, or doors, use a fine sandpaper to sand the entire surface.

Painting Supplies
Using the right painting tools will ensure optimum results when it comes to painting any room in your home. You’ve chosen just the right colors for the room you’d like to paint, but are not sure of the painting tools to use to get that professional look. Here you’ll find all of the information you need to make any painting project go more smoothly and get excellent results.

Paint Surface Preparation Tools
Surface preparation is crucial in painting interiors. It is essential to have a dry, clean, obstruction-free surface before you start to paint. Here are the tools you’ll need:
Screwdriver: to remove all outlet and switch covers
Painter’s tape: to place on trims, baseboards, uncovered outlets and switches, and any other surface that needs protection from paint stains
Paint scraper: to remove cracked or peeling paint and to apply caulking compound or putty to cracks, nail holes, and other surface depressions
Steel wool / Wire brush : to remove grime and old paints or stains from raw wood
Sandpaper: to smooth out imperfections, sags, drips, or runs on walls or other surfaces
Damp cloth: to wipe clean surfaces to be painted after using steel wool or sandpaper

Paint brushes
• Used to cut in and out of smaller and more detailed areas, including trims, corners, and edges.
• Brushes are small and flexible – they work well when controlling paint.
• Also used to create a textured effect with brushstrokes.
• Nylon or polyester brushes are perfect for latex (water-based) paints.
• Natural brushes are good for oil-based paints, varnishes, and stains.
• Paintbrush sizes: A1- to 2-inch brush is ideal for small spaces, tight trim areas, touchups, and detail work. A 2.5- to 3-inch brush is perfect for trim and corner work, and the larger 4- to 5-inch brush is recommended for larger areas like walls or side paneling.

Paint Rollers
• Paint rollers make painting go more quickly, but should be used only for painting walls, ceilings, and other large, flat surfaces. They can be used to apply both latex and oil-based paints and stains and do a fine job with both gloss and semi-gloss coatings.
• Paint roller sizes: The standard roller length is 9 inches. For smaller areas, a 4-inch or 7-inch roller cover may be used. For larger areas like walls, ceilings, and floors, 14-inch and 18-inch rollers will get the job done more quickly

Here’s a comprehensive list of painting tools and supplies you’ll need to give your interior a gorgeous and lasting paint makeover:
• Primer and paint
• Paint brushes and paint rollers
• Paint paddles
• Roller trays
• Mineral spirits/solvents (to clean up oil-based paint)
• Drop cloths or tarps and cleaning cloths
• Caulking gun, putty knife, and caulk/joint compound
• Steel wool, wire brush
• Tack cloth
• Painter’s tape
• Screwdriver
• Sandpaper

Painters commonly use products such as paint strippers that may contain toxic, flammable or combustible  chemicals. These and other concerns can make the job hazardous for workers who do not take proper safety precautions.

Identify potential safety and health issues:
• Heights/ falling injuries
• Ladders, platforms and scaffolds
• Eye injuries
• Confined spaces
• Slips, trips and falls
• Exposure to bacteria
• Chemical exposure
• Exposure to mold
• Noise
• Heat and cold exposure
• Repetitive tasks
• Standing for long periods
• Painters should learn safe work practices for:
• Working near falling objects
• Proper lifting techniques
• Maintaining equipment in good working order
• Selecting and wearing personal protective equipment
• Working in confined spaces
• Clearing clutter
• Reporting a hazard

Step 1: Spot check
First, check that you haven’t got paint on your socks or the soles of your shoes – this will help you to avoid spreading it around your home.

Step 2: Clean your tools
Give all your painting tools a thorough clean so that they can be used next time. This includes anything you used in the decorating process, such as roller， scrapers and paint trays. Use warm, soapy water for water-based paint, and a solvent-based cleaner for solvent-based paint. Be sure to wipe them dry to prevent rust.

Step 3: Clean your brushes
Likewise, you’ll want to clean your brushes and rollers before any paint on them dries. If you've used water-based paint, wash brushes and rollers in cold, running water, then in warm water with a little detergent and again in cold, running water. For solvent-based paint, clean your brushes with a solvent-based cleaner and then wash them in warm water with a little detergent.

Step 4: Store your brushes
Let your brushes and tools dry completely, and then store them either by hanging them up so that nothing touches the bristles, or by laying them on a clean flat surface.

Step 5: Wipe your paint tin
Wipe the outside edge and interior rim of your paint tin before you press the lid firmly back on. This prevents spreading any paint drips and makes it easier to re-open the tin in future.

Step 6: Clean paint splashes
Got paint splashes on fittings or glass? These are easily removed. Simply wait until the paint dries, and then wipe the sur[1]face with a damp cloth or scrape gently with a blunt knife.

Step 7: Fold your sheets
Finally, fold the edges of drop cloths and sheets towards the middle to avoid any drips on the floor or other surrounding surfaces.

1.Protect surrounding areas. 
Remove all the big  furniture from the area you want to paint in, as well as all light switches and electrical outlet covers. Spread a large cloth to cover the floor (no, don’t use your stack of old newspapers — the paint droppings will just seep through and stain the floor below), and use painter’s tape to fix the cloth to the edges of the walls. Apply painter’s tape, in short overlapping strips, over other areas you want to protect like door frames and handles, window frames, trims, mouldings, floor corners, etc. pressing down firmly on the edges.

2.Firm and clean the surface.
Rub a suitable abrasive paper or sandpaper across the targeted areas to remove any loose particles and to smoothen the surface. Wipe dust off the area with a clean piece of cloth.

3.Prime the walls.
You can skip this first stage of priming and head straight to putty work, but most house painters recommend an initial priming. Primers make your paint job easier, better and more long-lasting by turning your focus areas into uniform surfac[1]es that can receive paint well and by acting as sealants to prevent stains from bleeding through. These can either be water- or oil-based — use the latter in case of heavy stains. So, if you’re opting for priming initially too, use a roller and spread primer evenly across the walls, and then let dry.

4.Inspect the walls.
Use a putty knife to fill any of these cracks or holes with putty, removing any excess compound while doing so, and then let dry. Once the putty has dried up, use a very fine sandpaper to smoothen the area again and then wipe the walls clean with a sponge or cloth.

5.Outline with primer again.
You know the areas where the walls meet the ceilings, baseboards, other walls, doors and window frames? Well, paint primer along those edges to create a few inches of bands. Then slowly, cover up the rest of the wall. Once the primer has dried out, lightly sand away bumps or any uneven surface to smoothen the layer.

6.Paint the walls and remove the painter’s tapes.
Once you’ve primed the required surface, it’s time to paint it with the first coat of your chosen colour. But make sure that if you’ve chosen a pale finish coat, you opt for a pale first coat as well. And if you’ve chosen a dark finish coat, you must opt for a dark first coat as well. Once the base coat is evenly applied or the previous paint surface has been washed out, apply your choice of a decorative finish, which is the outermost layer. Use your roller to apply paint from the ceiling downward. Finally, remove the painter’s tape.