So, what did I learn these last few weeks? How to spray Advance.
Also learned that many people that I have talked to have told me that they have no problem in spraying BM Advance with a 4 or 5 stage HVLP turbine but they all forget one very important detail, what colour are they spraying. The colour of the paint plays a very important role in determining what needle air cap set you will use and how much air you use for atomization.
For example, BM recommends for HVLP, 7.5psi, 1.3mil needle and 4-5 wet mils. This works well for Base 1 Advance colour white. In other words, right off the shelf. I was able to get good results following their recommendations with Base 1 White Advance. I still thin 10% though.
Now if you tint your paint to a medium grey, colour cc-518 Escarpment for instance, it requires Base 2 and a lot of colour/solids are added to the paint making it much thicker with a higher percentage of solids. So using the same specs you used for Base 1 White will not work with the medium grey colour. I would assume this is the same for any paint you tint.
So for Advance here is what I concluded.
Base 1, White. 7.5 - 9.5 psi, 1.3 mil and 10% thinning ( optional )
Base 2, CC-518 Escarpement, 7.5 - 9.5 psi, 2.0 mil needle and 10% thinning
So in the future, I think it would be very helpful that when somebody states on the fog that they have no problem spraying a particular type/brand of paint, that they should provide everyone with more information, such as;
- Brand and Type of paint
- Colour and Base that was used
- size of needle and air cap set
- What stage of turbine ( hvlp in this case)
- what brand and type of gun they are using. This makes a big difference as every manufacture has their own way of delivering the air to the tip
- % thinned and with what
I think this would go a long way in helping people that are new to spraying, ( Like me ).