Before you can apply a coating, the surface must be properly prepared. There are many industry standards that can support you in this. The ISO 8502 standard provides the different test methods to be applied aplied, prior to coating application.
Within the industry, Grit Blasting is the most common technique to prepare a surface before coating. There are easier alternatives, that create a similar roughness en even higher cleanliness of the metal substrate. On of these technologies is provided by MontiPower. This technology uses a Bristle to remove old coating layers, remove dust and dirt and create surface roughness that creates an anchor profile, to promote adhesion of the coating to the substrate.
Tools from MontiPower are offered in a variety of power options: Pneumatic, wired or cordless (battery) driven. Especially the cordless devices create a lot feedom of use.