Universal paste and aerosol: differences
Universal paste and aerosol contain the same product. The only difference is based on using in aerosol additional propellants and solvents allowing for application through a nozzle. The main difference between these 2 products is that the paste can be irradiated just after application, while it is recommended to wait a moment after application of the aerosol until propellant gas and solvent evaporate, thanks to which one will achieve repeatability of processing parameters. A choice of product types depends on preferences, quantity of pieces to mark or a time to fulfil an order.
Aerosol operation is shown in the following instructable video