This weekend I got a lot of final finish work accomplished on the cabinet...a full weekend of it.
Friday night I skim-coated the entire cabinet exterior with Elmer's Wood Filler (with water added to make it a little more gooey). I didn't bother with the inside areas of the cabinet, as they will be unseen and I don't care if the wood grain is visible in those areas.
I spent all day Saturday sanding the wood filler on the bottom section with 220 grit sandpaper, followed by 320 grit. I had to do this by hand with a sanding block because the power sander was removing the wood filler from the wood grain, even with 320 grit sand paper and light pressure. I was able to finish the bottom section by the end of the night Saturday.
Today (Sunday) I tackled the top section. By 5pm I was finished, and was ready to clean all the dust off the two cabinet sections. I went to Lowe's to buy some tack cloths, but instead came home with a new Porter-Cable air compressor. The $169 was worth every penny, as I was able to blow all the dust particles off the entire cabinet in about 20 minutes. Plus, it'll come in handy for future projects, as I can use it to power nail guns.
Note how visible the wood grain is now. The wood filler dries white. This gives you an idea of how many divots are in oak wood grain. I could have saved myself $60 ($10 per sheet of plywood) and ~16hrs of labor if I would have just used paint-grade ply! Blah...live & learn.
I did a little mutli-tasking today also. I masked off the tank with plastic and 2" painter's tape in preperation for painting, and placed it on a 9'x12' plastic sheet in my garage. For paint, I used American Tradition gloss black enamel spray paint from Lowe's. I bought one can, but ended up going back for a second when the first ran out. I used two full cans on the tank, with probably 12-15 very light coats. I painted the sides and back of the tank, as only the front panel is viewable in my cabinet.
I sprayed very light coats, allowing 20-30 minutes between each thin coat.
The tank complete after two cans of paint and probably a dozen very light coats. I didn't spray the tank while the cabnet sections were in the garage; this picture was taken after I had put everything back in the garage and closed shop for night.