Spend ample time for preparation. Make sure the surfaces of what you’ll work on are smooth and free from cracks. If necessary, use gap filler to fill holes and depressions. The longer the preparation, the longer the paint job will endure.
Invest in high-quality supplies. Use top-quality, positively-reviewed brushes, rollers, stains, and primers. Don’t settle with cheap ones unless you want the paint job to last less than a month! If you can’t afford, it’s better to save up or rent first.
If needed, prime the surface first. Primers are so important they can be likened to the foundation of your house.
Repair before you paint. If the surface is damaged, don’t think painting the area will be the solution! Repair damaged wood or any other surface. Also, ensure that rust is absent from the surface. You also have to repair indoor moisture to prevent them from causing outdoor paint issues. Mushy basements and roof leaks can later on lead to paint problems because moisture can evaporate and life the paint up as it leaves the wall especially when the room is poorly ventilated.
Clean before you paint. If you let dirt remain on the surfaces, it will stick to the paint. It might even leave lumps. What you have to do is remove cobwebs, grease, and the like before you paint. It’s better to clean first with bleach and water, then use siding cleaner. You can also scrub by hand and use a garden hose. No matter how you clean the surface, just remember to rinse completely and get rid of the cleaner residue. This type of residue can loosen the paint once the latter is applied.
Sand rough edges! Don’t think twice, remove damaged paint with sandpaper. If you don’t remove these rough, sharp edges, they will produce weak and thin areas in the new paint. After sanding the surface, brush the dust away and rinse the siding. Then, gently but thoroughly trim it.
Apply proper technique. To make sure the paint job will last long, you should apply the paint properly. The thickness should be correct—around 4 to 5 mils when wet. It should be as thick as a single sheet of copier paper. The thicker it is, the more likely it is to crack and subside. The thinner it is, the weaker the dried paint will be. So it’s important to maintain thickness all through out for an even coat. Even if you’re not a pro but details matter to you, you can use a wet-film thickness gauge to check the wet thickness of the paint. The only downside is the price but there are new and inexpensive models now.
Paint at the right time, in the right place. Never ever in your whole life should you apply paint when it’s exposed to high wind or direct sunlight. It will make the petroleum or water solvents evaporate out from the paint sooner than it should. It will also decrease the capability of the paint to flow out and smoothen. Plus, it’ll weaken the bond between paint molecules.
Using one of the good paint sprayers will also help make your spray job last longer.