Painting cast iron grill parts makes sense if the metal is still functional and the surface requires refurbishment. First, distinguish the casing, the support, and the grate that comes into contact with food. For each of these areas, you need to check the intended use of the paint, not just its temperature resistance.
Assess the cast iron and the old coating
Start work on a cold component. Check for cracks, corrosion, and loose parts. Paint will not restore the cross-section of weakened metal or repair a damaged bracket. Such a component first requires determining further suitability.
Remove loose coating and contaminants in a manner appropriate for the substrate. If the old layer is preserved, confirm compatibility with the new finish. The surface for painting should meet the manufacturer's requirements, including cleaning, degreasing, and drying.
Check the paint for the specific part
Vitcas black heat resistant paint is declared to withstand up to 800°C and is intended for use on properly prepared surfaces, including grills. This does not constitute confirmation for direct contact with food. The manufacturer states that the product has not been tested for such contact.
Therefore, do not transfer the method of refurbishing the casing onto the grate surface on which food rests. The manufacturer's instructions specify application of this paint without primer.
Plan the application and curing
Choose working conditions from the current instructions. Protect the surroundings, ensure required ventilation, and apply layers in the recommended manner. Do not spray aerosol onto hot cast iron or near a flame. A thick coating is not automatically more durable than properly applied thin layers.
Separate surface drying from full curing during the required heating. Assess readiness for reuse according to the instructions for the specific variant. After installation, check the alignment and movement of parts; if the coating detaches again in the same place, return to evaluating the substrate and actual working conditions.