Mix material for 30 seconds. Rusty areas should be saturated without leaving any excess material. Recoat within 2 hours in good weather. Recoating can proceed with urethanes while surface is still somewhat tacky. OC40XLS has a short recoat window of 48 hours for maximum adhesion.
Plan work to include priming and finishing in the same day.
If window has been lost, re-prime with OC40XLS at the original spread rate. After cleaning, flush spray equipment with xylene followed by mineral spirits. Leave mineral spirits in the line to prevent rusting. This product is designed for professional use. We also recommend the use of fabric coveralls and neoprene or other resistant gloves.