Extreme Heat Matt Black can withstand temperatures of up to 650°C. Ensure surface is clean and free of any rust, paint or other extraneous or loosely adhering matter. Recommended methods include wire brushing, grit blasting or abrasive cloth/paper, followed by wiping with a suitable degreaser. No primer is required. Shake the can thoroughly for at least two minutes and spray a light mist coat from a distance of 15cm – 30cm, allow to dry for 15-30 minutes depending on surrounding temperature and apply a further coat giving full coverage. Allow to dry.