One, How to renovate plastic steel doors and windows
1. Cleaning method
This method is primarily used for treating yellowed and stained PVC doors and windows. We can use a scouring pad and cleaning powder to scrub the affected areas.
2、Spray painting for color change

Primarily, spray painting is used to address issues such as yellowing that cannot be resolved with washing, or when you want to completely change the color of your PVC windows. In these cases, you can purchase and apply spray paint yourself, or you can hire a professional to perform the painting.
3、Replace parts
Replacing components in plastic steel windows primarily involves renovating plastic steel door and window parts due to aging. If a plastic steel sliding door or window does not slide smoothly, it could be due to worn, aged, broken, or non-functional sliding wheels. In such cases, the sliding wheel components can be replaced.
Two. What type of paint should be used to repaint steel-plastic doors and windows for fire protection?
1、When renovating, it is recommended to use the same type of paint.
Refurbishing PVC fire-resistant doors and windows is a technical process. To achieve good results, it is best to choose paints of the same type as the original paint used on the PVC fire-resistant doors and windows. Generally, paints of the same type will have better adhesion. If the original paint was oil-based, it is best to use oil-based paint for refurbishment, and the same applies to water-based paint.
2、Regarding the selection of oil-based paints
There are many types of oil-based paints, and many consumers find it overwhelming to choose from so many options. Oil-based paints are primarily divided into polyester paints, nitro paints, and alkyd paints. Alkyd paints are older products, which dry slowly and are used less frequently in construction. Nitro paints dry quickly but produce thin coatings, requiring multiple coats, and are prone to discoloration in humid conditions. Polyester paints are the most widely used due to their fast drying time and good performance.
3、Selection of water-based paints
Water-based paints, as the name suggests, are paints that use water as a solvent. They offer several advantages, including non-toxicity, environmental friendliness, odorless properties, minimal volatile organic compounds, non-flammability, resistance to discoloration, and the ability to cover large areas.