How do you choose the right type of paint?

Step 1: Clearly define the core requirements and constraints.
It is essential to recognize that different substrate materials have varying requirements for paint adhesion, which forms the basis for material selection.
Metal substrates (steel, aluminum, cast iron): For long-term protection, it is recommended to use two-component paints, such as an epoxy primer combined with a polyurethane topcoat, which offer excellent corrosion resistance and rust prevention. If only temporary protection is required, a single-component alkyd paint can be used.
Wood-based substrates (furniture, panels): Single-component paints are more suitable, such as nitrocellulose lacquers (fast drying, easy to repair) and alkyd paints (cost-effective); for high-end solid wood furniture, two-component polyurethane paints are recommended (high hardness, scratch-resistant).
Plastic substrates (ABS, PP): Choose a single-component acrylic paint (easy to apply and with suitable adhesion) or a two-component polyurethane paint (wear-resistant and weatherproof, ideal for outdoor plastic parts).
Concrete/Wall Surfaces: Only single-component latex paint or single-component epoxy floor primer can be selected (two-component systems require professional application and are costly).
Clearly defining the environmental conditions and performance requirements is key to determining the weathering and corrosion resistance grades of paints.
Indoor dry environments (such as indoor furniture and equipment): Low performance requirements—single-component paints are sufficient to meet both decorative and basic protective needs at a lower cost.
Outdoor exposure environments (such as building facades, photovoltaic supports, and bridges): It is essential to choose two-component paints, such as two-component acrylic polyurethane paints, which are UV-resistant, rainproof, and resistant to fading and chalking.
Corrosive Media Environments (such as chemical workshops, marine vessels, and acid-alkali storage tanks): Prioritize two-component heavy-duty anti-corrosion coatings, such as epoxy zinc-rich primers and polyurea topcoats, which offer excellent resistance to salt spray and chemical media corrosion.
High abrasion resistance requirements (such as machine tool tables, flooring, and car wheel hubs): Choose two-component epoxy paint or polyurethane paint—these coatings offer high film hardness and excellent resistance to scratches and impacts.