Selection criteria for determining the correct unit for the production job is determined by answering 4 key questions.
1. What is the underlying substrate?
When the substrate of the blasting surface is of a metallic nature then a surface preservative agent should be added to the water being used to reduce the possibility of surface rust (flash rust) occurring immediately after the surface has been blasted.
2. What are the finishing requirements after blasting?
Contact the coating manufacturer to ensure that the coating agent is compatibility with vapour blasting technology. The coating may react poorly to a surface that has not been prepared to the correct specifications resulting in a substandard finished product.
3. Are there any environmental concerns with the location of the blast?
If the coating you are removing or the surface has any contaimination like Lead, you will be restricted in your use of Wet Abrasive Blasters, you will be required to capture all the run off water and filter it for the lead particles.
4. What is the overall size of the project?
Vapour blasting typically has a slower production rate per hour than conventional dry blasting. The slower production time on larger projects will require consideration as to the higher labour component. If it is a large project, you need to rememeber that most dustless vapor blasters only have a single outlet which means you will need multiple units onsite, adding to project equipment needs.
Graffiti is placed on quite a diverse range of surfaces from playgrounds (plastics), fences (metal) and walls (brick or concrete). To prevent the damage of the underlying surface structure, vapour blasting is a low impact solutions. With smaller and often unusual locations for the use of a mobile complete system is recommended.
Cleaning of machinery can require the removal of old paint coatings, surface rust and scaling. The surface may also contain contaminates like oils and greases that will also require cleaning from the surface before a new coating could be applied.
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