With the significant amount of wall and ceiling area, I wasn't looking forward to using a roller to paint the inside of the shop.  I've used air-spray guns to apply lacquer to my woodworking projects so I decided to try an airless paint sprayer.  I was going to rent one for 3 days but my neighbour Barry said I could borrow his, so I took him up on the offer.

The paint store recommended a coat of latex primer followed by two coats of latex semi-gloss finish. We calculated I needed 5 gallons of each and it came out nearly perfectly.  I had to buy one extra gallon of primer but that was probably due to my still-learning technique and the bare drywall in the primer phase.

I used TSP to clean and de-glaze the existing painted walls, then went ahead, painting one coat each day for 3 consecutive days. What did I learn?

• Airless sprayers are a huge time saver!
• Wear a full body Tyvek coverall, a brimmed hat, a respirator mask, safety goggles, thick gloves to your elbows and work boots.
• Spend a lot of time up front masking off everything you don't want painted.  Masking tape+newspaper, thin plastic sheets.
• Semi-gloss white is best for a wood shop: dirt and dust won't stick, and the light reflects very well.
• The primer and multiple coat strategy worked perfectly - trust the people at the paint store!
• I used a 10'x12' plastic tarp under my work area.  It worked pretty well but a bigger one would have caused less moving around.
• I used a 1'x3' section of cardboard as a blocking mask.  I used it at the bottom of the wall on each spray and some other spots.
• The cardboard got soaked with paint so I alternated between two pieces.
• Sprayed paint particles go *everywhere* so I'll have to wash the floor to get the fine layer of paint off the epoxy floor paint.
• Cleanup of the sprayer is critical.  Flush well with water, then pump mineral spirits into the lines and gun so it won't rust.
• Buy lots of plastic sheeting and tape it down around the perimeter of the floor - I spent hours scrubbing overspray!

With the windows completely masked off and the fluorescent light fixtures removed, it was too dark to get good pictures of the process.  Here is a picture before painting, and several views after the final painting coat and cleanup: