Fibreglass Repairs to fibreglass surfaces often require removal of top layers of resin without causing damage to the gel coat. Smaller garnet grains will facilitate controlled surface preparation, localised repairs and create the desired feathering effect onto the intact resin.
Graffiti removal The removal of graffiti will often need to be repeated on regular occasions. Hence, the facility to do the job without undue damage to the substrate is invaluable. The use of a finer grain garnet gives the blaster greater control and helps wear away unwanted decoration without ripping into the surface.
Turbines and propellers Even the finest grade of garnet remains a hard and sharp tool. When turbines and propellers become encrusted with detritus, ultra-fine garnet at controlled pressures can be used for brush blasting without affecting the dynamics of the work piece.
Cases when finer garnet grains may not be appropriate The range of particle sizes available within different grades garnets and the garnet performing at variable pressures combine to achieve a variety of finishes according to specific requirements. However, garnet performance is determined by the virtue of energy produced by velocity.
When removing thick soft coatings, the energy may be absorbed before the garnet grains achieve full impact potential. Hence, the heavier features of larger grain garnet can be more effective. Equally, when blasting off high build coatings above 500 microns in thickness and heavy corrosion on ships hulls, finer garnet grains may not be appropriate.
Back to home