@anna_asking this is a big depends answer. Intumescent paint is applied intumescent paint on the steel beam to protect it and obviously your building, work from the effects of fire. You would need to know the composition of it and then possibly contact the manufacturer of that particular paint. Some let you paint over it, others do not. Some of the better paint suppliers can also be helpful in determining if you can and may have a product available that would comply with this.
@anna_asking this is a big depends answer. Intumescent paint is applied intumescent paint on the steel beam to protect it and obviously your building, work from the effects of fire. You would need to know the composition of it and then possibly contact the manufacturer of that particular paint. Some let you paint over it, others do not. Some of the better paint suppliers can also be helpful in determining if you can and may have a product available that would comply with this.