On 6/2/2014 6:37 AM, Swingman wrote:
On 6/1/2014 5:43 PM, wrote:

Just bought a spray can of minwax polyurathane for my final coat on an
old walnut table. Previous coats had been minwax polyurathane fast
drying rub-on with sanding in between. I live in a arid region of the
country, so I know moisture is not a problem. The spray can of minwax
left a milky, rough finish. I will sand it off tomorrow and go back to
my hand rub routine. Very disappointing product and waste of money!


I have used two separate cans, satin and semi-gloss, almost every day
this past week of this exact product, making stain samples for color
decisions for a client, and have not had a problem.

Funny thing ... I was using these same rattle cans yesterday to do
another couple of stain color samples and decided to change the spray
pattern from vertical to horizontal; something that can be done with
these new rattle cans with a twist of the nozzle, as you would expect
with today's technology.

Lo and behold ... after making a few normal passes with the spray
pattern to vertical, I changed the spray pattern to horizontal and the
spray immediately came out milky/cloudy on the surface of the piece.

(Obviously a _moisture related_ phenomenon - most likely due to the
expansion of the compressed gas changing the relative temperature
(PV=nRT) of the different nozzle passages, then reacting with the hot
humid air).

Didn't last long, but my initial reaction, and remembering this thread,
was WTF??

--
eWoodShop: www.eWoodShop.com
Wood Shop: www.e-WoodShop.net
https://www.google.com/+eWoodShop
https://plus.google.com/+KarlCaillouet/posts
http://www.custommade.com/by/ewoodshop/
KarlCaillouet@ (the obvious)