BMW April 2022

If  you’re looking for the perfect paint spraying system, probably all too soon any partner can realise that delivery speed, ease of maintenance and other key attributes make a huge difference to a best buy choice, but painter performances on gun speed and evenness of paint layout often play a vital part of gun choice. 

Buying a top-notch spray gun can be quite an issue for many body shops. 

A top-class spray gun is in today’s market a unit that will always deliver good day-to-day operating hold up that can handle a body shops routine. It must also be capable of delivering wet look gloss finishes that look like glass. Personal preference makes up a big part of all purchases. One key area to look at is weight because a fully loaded spray gun gets quite heavy, so ergonomics play a pivotal role in everyday use. Pick a gun that won’t end up causing operator fatigue.  

A great many shops opt to buy cheaper spray gun offerings, but in truth, often they deliver poor mileage on material used and will in the end consume much more, with poorer high volume, low pressure output performance. They will also ultimately in some cases need much faster replacement because they use less costly needle nozzle material metal design components that simply wear out.  

You get paid once on any job 

Avoiding a re-do is paramount to success in today’s competitive market and we have moved into a new technology on refinish materials with high solid 2K and waterborne products, all of these paints have either higher or lower levels of solids. So, a one gun to fit all users in most cases won’t work. In general terms, tip spray gun makers have worked very closely with the major paint refinish system manufacturers across the world to develop a special application chart to optimise results. So baseclear and primer set-ups can be taken from their recommendations of practical spray out tests but will virtually eliminate costly failures. Often you will find that information on spray gun set-up on close to 20 paint makers technical standards on the gun makers website. 

Tips for a quality finish 

Ambient temperatures plays a major role on refinish application. For example, most thinning ratio recommendations are taken at a constant temperature of 25ºC  but temperature variances in spray shop conditions – like colder winter conditions – often will see a rise of one second thicker in viscosity in materials in use for every degree that the temperature decreases. So winter conditions make the paint more thixotropic (thicker) and more thinners will ultimately be needed to get the correct atomisation and a good even layout coat. Conversely, extra heat in ambient conditions will cause a reverse effect and make the recommended thinner – or reduced levels – to remain less than recommended so as not to overthin the material in use. 

State-of-the-art equipment advantages 

These days new equipment offer almost boundless advantages with HVLP sophisticated technology with up to 85% of the material being sprayed will simply be transferred onto the repair substrate reducing material consumption dramatically. It also offers less spray bounce-back on application for half mask respirator users. This is a vital point of interest. Almost all materials in high solid pants can be applied with either a 1.4 or 1,3 tip needle nozzle size with these super saver type new spray guns. Their versatility and faster paint delivery speed will also result in a faster job completion time as an end user result. There are a number of cost options on offer from various spray gun supply companies to reduce the initial cost of a quality spray gun set-up. Importantly its best to remember during cost calculations that material savings will soon cover any extra costs.  

Small area repair specialised equipment is important 

With a huge increase in body damage repair on small area repair a painter is spoilt for choice for VOC compliant spray guns. The mini jet type spray guns make a perfect companion for both top-class finishes and also painting areas of different access they have great balance and ease of use. They are also available with a full range of nozzle set ups and overall their costs on material savings will become invaluable with paint savings within a matter of weeks in everyday use.  

Don’t over atomise your primer application 

Preparation primer materials in most cases fulfil a very important foundation function and often a painter will be using an old tip coat spray gun handed down for primer application. These days a state-of-the-art primer HVLP spray gun will drastically reduce paint consumption and often with a lightweight fatigue-free design. Always use a needle nozzle between 1.7 and 2.0 to achieve smooth minimum overspray results – while importantly for waterborne refinish – get a stainless steel non-resulting nozzle set to avoid rusting of parts. In general terms the new primer specific spray guns will avoid solvent entrapment with these viscous materials. This type of application results in an even, overall paint finish that often dries in a much-improved manner while avoiding solvent popping problems found in the primer coat.