1. Welding requires a certain level of skill and training to produce high-quality welds. Welders must have a good understanding of welding techniques, electrode selection, and proper settings for the welding machine. Inexperienced or untrained welders may produce weak or defective welds.
2. Limited Joint Accessibility: Arc welding can be challenging in situations where the workpiece has limited accessibility. It may be difficult to position the electrode and maintain the arc in confined spaces or complex geometries.
3. HAZ (Heat Affected Zone) - with traditional welding most of the times welded materials have heating deformation.
4. Performance - traditional welding have less performance then laser in 20-30 times.
5. Finishing processes - traditional welding required finishing processes: Grinding, polishing, cleaning

Environmental Concerns: Sandblasting generates dust and debris containing abrasive materials, which can be harmful to the environment and pose health risks to workers if not properly controlled and contained.

Surface Damage: Depending on the abrasive material and pressure used, sandblasting can potentially create surface roughness that is too aggressive for some applications, leading to excessive material removal and potential weakening of the steel.

Limited Precision: Sandblasting is not ideal for precision cleaning tasks because it can be challenging to control the depth and uniformity of material removal, making it less suitable for delicate or intricate surfaces.

Labor-Intensive: Mechanical polishing is a labor-intensive process that may require skilled operators and longer processing times, leading to higher labor costs.

Limited Removal of Deep Contaminants: It may struggle to remove deeply embedded contaminants or rust, which could remain beneath the surface and compromise the effectiveness of subsequent coatings.

Surface Consistency: Achieving a perfectly uniform and consistent surface finish can be challenging, particularly on large or complex steel components.