There are several factors to consider when choosing a manual coating sprayer to suit your needs.
Price
Galvanised sprayers are the cheaper option, so may be better if you only have a one-off job to perform. Stainless and plastic sprayers can be considerably more expensive, but should outlast galvanised ones if used maintained correctly.
Coverage area
Plastic sprayers tend to be larger and so can hold more mixture and spray larger areas. Because of this, they do not come with a reducer plate and are often the choice of professional plasterers and builders.
Steel sprayers, such as the galvanised and stainless versions, are, on the whole, smaller and have reducer plates enabling more precise coverage to smaller work areas if needed.
Galvanised steel sprayers
Galvanised manual coating sprayers tend to be the cheapest option when purchasing. This is due to the materials and manufacturing process being less costly than other types.
The main casing is often a thin sheet steel shaped into form and then coated with a zinc protective layer. This makes the sprayer lighter but susceptible to rust once the galvanised layer wears through.
ADVANTAGES
DISADVANTAGES
Comes with reducer plate
Costs less than stainless steel and plastic types
Lightweight
Thinner casing more susceptible to damage as galvanise can flake off over time resulting in rust/corrosion
Stainless steel sprayers
Stainless steel manual coating sprayers are a more expensive option when purchasing. This is due to the materials and manufacturing process being more costly than galvanised types.
The main casing is stainless steel sheet that is shaped into form. The stainless steel is denser than the lower grade sheet steel, which makes the stainless sprayer slightly heavier than the galvanised types.
ADVANTAGES
DISADVANTAGES
Stronger than galvanised steel
Comes with reducer plate
Costs more than galvanised types
Heavier than galvanised and plastic types
Plastic moulding sprayers
Plastic manual coating sprayers are the most expensive of all types. Due to the lighter plastic frame, this type of sprayer can be made larger yet still light to hold, compared to steel types.
Plastic types do not come with a reducer plate as they are designed to apply larger coverage areas. This makes them the choice of professional plasterers/builders when faced with larger projects.