Spray Paint Adventures and questions
Hi,
I made some mdf coat racks for the kids, and so to get a good clean paint finish I thought I would spray rather than brush them. Other than with cans, I've never sprayed before, so this was always going to be an experiment. I ended up buying an airless spray gun (you know, those little electric ones), but in the end got very mixed results. I'm wondering if my results are normal, or if I did something wrong?
A) Thinning. I first primed the mdf with acrylic timber primer. I read elsewhere on this forum that acrylic works best with airless sprayers. The sprayer came with it's own viscosity testing funnel. The primer paint is very thick and gluggy, and I was very surprised how much I needed to water it down. About 50:50. Is this normal for acrylic paints? Or it this just airless sprayers? What do professional painters use when spraying the inside of a house - do they use commercial HVLP sprayers?
B) Coats. After watering it down so much, each coat of spray ended up being so thin I needed 3 coats of primer. I realise spray goes on much thinner than brush coats, but this thin?? Should I have used Flotrol instead of water, as I read here that it lowers viscosity without watering down the pigment as much as water does.
C) Overspray: I realise that with a thin, tree-like coat rack, there would be overspray. The trouble is, with a spray can you can get within about 10cm of the surface and still get smooth, gentle coverage, but this seemed impossible with the airless. The closest I could get was about 30cm, which obviously meant lots of overspray. Is there a way to make the spray more "gentle", or is this just the way airless works?
Thanks,
John.