Yes, you can absolutely apply primer too thick, and doing so usually causes more problems than applying it too thin. Whether you are painting walls, working on a car, or detailing miniatures, the goal is always a uniform, thin coat that allows the paint to properly adhere.
The best primer for fiberglass is a 2K (two-part) epoxy primer. It chemically bonds to the slick surface and provides a waterproof seal. The exact product depends on your project: marine, automotive, or general household/doors.
Use an oil-based (alkyd) or shellac-based primer on Oriented Strand Board (OSB). Oil-based formulas block the wax/resins in OSB from bleeding through, and they prevent the wood from swelling or delaminating, which water-based (latex) primers often cause.
Most of the time you will want to apply two coats of ProMar 200®, if your color change is significant using an appropriate primer is also a good idea.
Common primer mistakes depend on the context—whether you are prepping walls for paint, applying makeup, or working with ammunition. Here are the most frequent errors in each category:
Most professional painters will tell you—two coats of primer is often the safe choice. Here's why: surfaces like new drywall, bare wood, or even older plaster have different levels of porosity. That means the primer gets soaked up unevenly, leaving the surface patchy.
Many makeup artists (MUAs) skip primers, favoring thorough skin prep (cleansing, exfoliating, and deeply moisturizing) over adding an extra layer of product. They find that hydrating foundations often apply more seamlessly directly onto well-prepped skin, avoiding the heaviness or texture issues that can occur when primers, skincare, and foundation clash.
To paint a room like a professional, always work from top to bottom. The correct order is: Ceiling →right arrow→ Trim (Doors/Windows) →right arrow→ Walls →right arrow→ Baseboards. This sequence ensures that any accidental drips or splatters fall onto surfaces you haven't painted yet, saving you time on cleanup.
ProMar 200 is objectively the better and more durable paint. It offers better coverage, superior washability for high-traffic walls, and resists scuffs far better than ProMar 400. ProMar 400 is only better if you need a dead-flat finish on ceilings or are just trying to hide imperfections on a budget.
The hardest colors to paint over are red, black, and deep, dark blues or greens. Because of their strong, saturated pigments, these colors easily bleed through lighter topcoats. Attempting to cover them without proper preparation often results in streaks and requires many frustrating, time-consuming coats of paint.
It is advisable to use two coats of an oil-based primer for the best results. If well constructed, the OSB board should be able to resist some moisture in the early periods. However, over time, the material can get damaged by excessive moisture.
For most plywood projects, an oil-based (alkyd) primer or a pigmented shellac-based primer is the best choice. These primers seal the wood fibers effectively, block natural wood tannins from bleeding through, and prevent the grain from raising.
Neither is inherently "better" than the other, as they serve entirely different purposes. Think of a primer as a foundation meant to help paint adhere and block stains, while a sealer is a protective barrier that prevents moisture from escaping or the topcoat from being absorbed.
Priming the surface.
If you are working with bare fibreglass, and you have abraded the surface, you will need to apply 1-2 coats of primer undercoat.
Its advanced chemistry provides a sound anchor for topcoats while reducing or potentially eliminating the need for sanding dense, glossy surfaces including Kynar®, PVC, vinyl, Formica®, glass, tile, glazed brick, chalky paints, glossy finishes, fiberglass and metals.
ProMar 200 is not a "cheap" or low-end paint in terms of quality, but it is a "contractor-grade" product. This means it is mid-grade and offers decent durability and washability, but it is priced differently depending on whether you are buying as a professional or a walk-in retail customer.
The highest-rated interior house paints are dominated by professional-grade lines from premium brands. Industry experts and consumer testing consistently rank Sherwin-Williams Emerald, Benjamin Moore Aura, and Behr Dynasty as the absolute top performers for durability, coverage, and washability.
Both Benjamin Moore and Sherwin-Williams are top-tier, premium paint brands, but neither is universally "better." Benjamin Moore generally wins for color depth, richness, and a smoother finish, while Sherwin-Williams excels in overall durability, application ease, and budget-friendly accessibility.
Hiring a professional to paint a 12x12 room typically costs between $400 and $950 for labor and materials. This generally covers two coats of paint on the walls and standard surface preparation.
To make a home look expensive, rely on sophisticated neutrals, earthy greens, or muted blues rather than stark whites or highly saturated brights. High-end spaces feel cohesive and intentional, using layered tones, natural materials, and high-quality finishes to create a calm, custom feel.
Achieving a flawless paint job comes down to proper prep and technique. The most common painting mistakes include skipping surface cleaning and sanding, failing to use a primer, overloading your brush, rushing dry times between coats, and choosing the wrong paint sheen for the space.
Yes, primer is highly beneficial for mature skin. As skin ages, it tends to become drier and develop uneven texture, which causes makeup to settle into lines or fade quickly. A primer acts as a smoothing, hydrating base that blurs pores, keeps your foundation from creasing, and prevents the skin from "eating" your makeup.
The "2/3" rule usually refers to one of two popular beauty and styling concepts. Depending on what you are looking for, it is either a quick-styling routine for getting ready or a makeup technique to ensure a balanced, non-chaotic look.
Primer is generally not needed if you are painting over previously painted surfaces that are already clean, sound, and have a flat or eggshell finish. For makeup, you can skip primer if your skin is already well-prepped, you have a balanced skin type, or you are using high-quality foundation.