PPG Top Tip: How to avoid dust and dirt in paint

Dust contamination is where small, irregular particles appear in the paint film caused by foreign matter such as dust or dirt. These can occur in different sizes, shapes, types and patterns.

One of the main causes of dirt in paint is applying finish over an unclean surface. Be sure to blow off the job with compressed air and wipe over with a tac rag before spraying. Stir materials thoroughly to obtain a uniform mixture and strain before use.

Be sure when spraying in the booth, filters are checked and cleaned regularly to avoid causing incorrect air supply, extraction and pressure. It’s also important relevant equipment is kept clean as well as maintaining tidy work area to avoid dust settling quicker.

To remove dirt clean the surrounding work or booth area before spraying. If already occurred, sand down to a smooth surface and refinish. If isolated dirt, sand flat with fine paper, compound and polish.