Spraying Milk Paint, The Failures

Pumpkin Splatter

TRY ONE

My first use of the Earlex 5500 HVLP spray station was a learning experience. Here are the details.

  • Strained pumpkin milk paint (Old-Fashioned Milk Paint brand)
  • Went through viscosity cup in about 70 seconds
  • 2mm gun tip
  • Recipient: pine dry sink with one coat of shellac, and sanded
  • Results: splotches

I called Earlex tech support and got right to someone who was very helpful. I just wish I’d recorded the conversation because I wasn’t able to write down all the important stuff quickly enough.  Here are the bits I got down.

  • For the milk paint, use the 1.5mm gun tip
  • He recommended adding Floetrol, 1 ounce to 1 quart of paint, to help it flow
  • Thinning the paint to less than 160 seconds (in the viscosity cup) is fine
  • The tip size to use isn’t dependant upon the viscosity so much as just how fine you want the paint to atomize

That last item still confuses me, and I’m not sure I understood him correctly. Wouldn’t you want everything to atomize as finely as possible, thus just always use the 1mm tip?  Finally, he rattled off some situations where you’d want the different size tips

  • Lacquer on a grand piano (many thin coats?): 1mm tip
  • Furniture or trim: 1.5mm tip
  • Deck or fence: 2.5mm tip

In the instructions that came with the second tip was a little “Needle Selection Guidelines” chart:

Needle Tip Size Material
1.0/1.5mm Automotive, Acrylics, Synthetics, Polyurethane, Lacquers, Fluorescents, Wood Stains
1.5/2.0mm Oil base, Hammers, Oxides, Primers, Air Drying, Enamels, Varnish, Marine Paint, multi-colour, Industrial Synthetics, Latex Oils, Polyurethane, Aluminum
2.0/2.5mm Emulsions, Chlorinated rubber, Oxides, Zinc Rich Primers, Epoxy Plastic Adhesives, Polyurethane, Floor Paving Paints

TRY TWO

  • Strained federal blue milk paint (Old-Fashioned Milk Paint brand)
  • About one ounce Floetrol
  • Went through viscosity cup in about 80 seconds
  • 1.5mm gun tip
  • Recipient: pine dry sink with one coat of milk paint, and sanded
  • Results: splotches, slightly better than try one

I called Old-Fashioned Milk Paint for help. I quickly got to someone knowledgeable of their product. But they said they have not sprayed paint in many many (tens of) years. Her only advise was to mix it as thick as would go through the sprayer.

TRY THREE

  • Strained federal blue milk paint (Old-Fashioned Milk Paint brand)
  • With and without one ounce Floetrol
  • Went through viscosity cup in about 160 seconds
  • 1.5mm gun tip
  • Recipient: pine dry sink with two coats of milk paint, and sanded
  • Results: splotches

This time I tried it first without the Floetrol, and at the full range of spray pattern sizes, and amount of spray. (Pressure and airflow on my turbine can not be adjusted.) Nothing made much of a difference. After trying everything I could think of I added some Floetrol. Again, no change. Try number 3 was my last with this brand of milk paint unless I get instructions to try something drastically different.

This is the goal: Chris Schwarz spraying table with milk paint

Advertisements

About johnjoiner

Computer nerd by day, Dad and woodworker by night. Woodworking blog at https://johnjoiner.wordpress.com/
This entry was posted in finishing. Bookmark the permalink.

One Response to Spraying Milk Paint, The Failures

  1. Whoa! This blog looks just like my old one! It’s onn a totally different subject but it has pretty much the
    same layout and design. Excellent choice of colors!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s