I wanted to try my hand at spraying latex paint with my harbor freight hvlp machine Last time I tried spraying milk paint and I thinned it too much got a lot of runs. But that is user error, I wanted to see how latex paint would come out because it’s cheaper and you can get it in just about any color you’d ever want at my local home center.
If you get this machine, I recomend getting extra cups from rockler I’m disapointed in HF that they don’t even make or carry replacement cups for this machine that I could find. But since the HF model is the same as the rockler branded model, the cups work and they work well.
Being able to take off your paint cup, seal it then put on a cup of hot soapy water to clean out the spray gun between coats makes life so much easier and far less waste than having to empty the cup each time between coats.
The mixture ratio I used was pretty straight forward.
4 oz latex paint
1 oz flotrol
2 oz water based poly
For a full cup I did
20 oz paint
5 oz flotrol
10 oz water based poly
An electronic cooking scale with a tare button helps with this, I had forgotten where I had gotten this from but noone pointed to this youtube video http://www.youtube.com/watch?v=VTEIo0RRFKw which looks familliar so it was most likely from there.
I didn’t get any pictures of day 1, but I got 3 coats of painting on the outside done on saturday, on sunday I focused on spraying the inside of the boxes, here is a picture of everything set up ready to be sprayed.
After letting the paint dry for several hours, I was able to put it all together under my router table I still need to make the drawer that will hold my wrenches and other accessories for the router table.
Here’s a picture of one side, the other side looks the same I just don’t have anything in there yet.
Here is a close up of the MDF, you can see it’s not perfectly smooth, it has a bit of a texture too it because of the splatter from the latex paint. I think this is due to method more than the device. I believe I applied the coats too thick so it didn’t allow for it to even out as easily, if I did thinner coats and doubled them up with sanding in between I think I would have had much smoother results.
The paint has a much glossier and better feel to it than straight up latex paint, this is most likely the poly at work, though you can’t sand the final coat enless you plan on doing clear top coats after which I didn’t think was needed because it looked and felt pretty smooth to me.
Overall it’s still pretty smooth and for a shop project it’s perfectly fine and fast. The only thing I haven’t mastered is the sides of MDF, I dunno it just soaks up so much paint I can’t get it to smooth out, even with several coats and sanding in between.
If I started earlier in the day (like around 11 instead of 3) I could have easily gotten it fully painted in a single day, which is pretty awesome if you ask me.
-- Easy to use end grain cutting board designer: http://www.1024studios.com/cuttingboard.html