Woodturner's Resource
Woodturner's Resource  
  • Featured Artist    • Websites   Support Wr
Tutorials, Projects & Tips   • Event Calendar   • Tool and Book Store
  Home Page Forum HelpSearch Map TPT Resources LoginRegister
 
Pages: 1 2 
Send Topic Print
Problem using water bassed Minwax poly (Read 274 times)
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Problem using water bassed Minwax poly
Sep 9th, 2018 at 2:43pm
 
I'm having a problem with little bubbles forming when I brush poly on my bowls.  Tried using a light coat or a heavier coat, but same thing.

Thanks,
Merle
Back to top
  
 
IP Logged
 
Register To Remove Ads
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 5,472

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Problem using water bassed Minwax poly
Reply #1 - Sep 9th, 2018 at 4:19pm
 
What species of wood are you applying it to?
Back to top
  
 
IP Logged
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #2 - Sep 9th, 2018 at 5:58pm
 
Its mimosa.  I looked and it seems the ones turned from  mimosa are the most problems. 

I'm down to about 1/2" or so of poly in the qt can.  Maybe its time I need to get a new qt.   

Merle
Back to top
  
 
IP Logged
 
Don Stephan
WR Addict
*****
Offline


WR Rocks!

Posts: 1,774

Cincinnati, Ohio, Ohio, USA
Cincinnati, Ohio
Ohio
USA

Gender: male
Re: Problem using water bassed Minwax poly
Reply #3 - Sep 9th, 2018 at 6:45pm
 
A first suggestion would be to apply in the same way to a clean piece of glass or plastic, to see if the bubbles are coming from the wood or brush.  If no bubbles on the glass or plastic, I'd try applying in the same way to a scrap piece of maple or cherry, a very smooth wood, that has been prepared in the same way as the mimosa.

Several years ago I finished mimosa with a 50-50 mix of mineral spirits and alkyd varnish, applied with a cloth and immediately wiped dry, with no problems I can recall.  But after 5 or so applications the open grain structure was still noticeable.

If the can is almost empty can we assume you've applied to wood in similar fashion with a similar brush in the past with no bubbles?
Back to top
  
WWW  
IP Logged
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #4 - Sep 10th, 2018 at 10:04am
 
I wonder if part of the problem is the poly has gotten a little contamination after using it right out of the can.  I looked at some maple and birch that had a very small amount after three coats.  Will be off to Lowes in a bit to get another qt.

Thinking part of the problem is the mimosa and part the poly.
Back to top
  
 
IP Logged
 
Tom Coghill
WR Addict
*****
Offline


Turning, when I am done
with my chores.

Posts: 1,099

Anchorage, Alaska, USA
Anchorage
Alaska
USA

Gender: male

Oneway 2436, 3 HP 220V
Re: Problem using water bassed Minwax poly
Reply #5 - Sep 10th, 2018 at 5:15pm
 
I always thin down my initial coats of water based finishes with 50 % water.  After the first couple coats, I apply the other layers 66/33 (dilute 1/3 with water).  I find this thinned finish allows the bubbles time to get out of the finish.  I also apply the finish with a squeeze bottle (like a squeeze Catsup bottle).  I apply the finish and smooth it with a very soft brush (all done on the lathe at low speed).
Back to top
  
 
IP Logged
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #6 - Sep 10th, 2018 at 6:40pm
 
Tom, what brand wb poly do you use?

I can't apply it like you do while on the lathe since these are all winged bowls I'm finishing.

Has anyone used Stays Clear wb poly?
Back to top
  
 
IP Logged
 
Frank Padden
Full Member
**
Offline


WR Rocks!

Posts: 64

Hudson, Massachusetts, USA
Hudson
Massachusetts
USA

Gender: male

Nova 16"
Re: Problem using water bassed Minwax poly
Reply #7 - Sep 10th, 2018 at 7:02pm
 
Have you tried applying it with a cloth instead of a brush?
Back to top
  
 
IP Logged
 
Register To Remove Ads
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #8 - Sep 11th, 2018 at 6:09am
 
Went to Lowes and got a new qt. and will try using a cloth.  If I still have a problem, will dilute with water and try again.

Will have to wait for better weather as I do finishing outside.  Too much dust floating around in my shop.
Back to top
  
 
IP Logged
 
Don Stephan
WR Addict
*****
Offline


WR Rocks!

Posts: 1,774

Cincinnati, Ohio, Ohio, USA
Cincinnati, Ohio
Ohio
USA

Gender: male
Re: Problem using water bassed Minwax poly
Reply #9 - Sep 11th, 2018 at 7:07am
 
Merle

What does customer support for the product have to say about bubbles on some woods?
Back to top
  
WWW  
IP Logged
 
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 5,472

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Problem using water bassed Minwax poly
Reply #10 - Sep 11th, 2018 at 8:41am
 
When polyurethanes bubble it's usually due to air being introduced during application. It can sometimes be due to surface contaminants or moisture in the wood. OR It can be caused by the application method. Using the wrong brush or over-working the finish van cause finish issues.
merle ward wrote on Sep 9th, 2018 at 2:43pm:
I'm having a problem with little bubbles forming when I brush poly on my bowls.


If you're brushing WB poly, you should be using a synthetic bristle finish brush. (not foam)
If you need to thin WB poly, use distilled water.
Back to top
  
 
IP Logged
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #11 - Sep 11th, 2018 at 3:58pm
 
Don, I didn't go to customer support, I did google it and it seems some aren't happy with it for the same reason.

Ed, I'm using a 2" sash brush with soft bristles.  I don't have any foam brushes.  Thanks for the tip for using distilled water when thinning WB poly.  Didn't know it would matter.
Back to top
  
 
IP Logged
 
Tom Coghill
WR Addict
*****
Offline


Turning, when I am done
with my chores.

Posts: 1,099

Anchorage, Alaska, USA
Anchorage
Alaska
USA

Gender: male

Oneway 2436, 3 HP 220V
Re: Problem using water bassed Minwax poly
Reply #12 - Sep 12th, 2018 at 9:50am
 
I use General Finishes water based finishes.  I start with the sealer then change to the satin or gloss finishes after that.  I build between 6 and 20 coats (they dry quickly so I can build 10 coats a day if I were to stick to it).  I sand between every 3 coats with a wet 600 - making sure I get any grit off the piece before the next coat.

The results are very good, - very durable and nice to feel in your hands Thumbs Up

I apply with a very soft, wide synthetic bristle brush that I find at the craft stores ($5 for 3).  I ALWAYS wet the brush with water before using it.
Back to top
« Last Edit: Sep 12th, 2018 at 9:52am by Tom Coghill »  
 
IP Logged
 
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 5,472

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Problem using water bassed Minwax poly
Reply #13 - Sep 12th, 2018 at 11:55am
 
merle ward wrote on Sep 11th, 2018 at 3:58pm:
Didn't know it would matter.

Anything that's in your water will be in your finish when you thin it.
Distilled water doesn't have any contaminants in it.
Municipal water can have additives, softened water has salt (sodium chloride or potassium chloride) and well water has who knows what depending on where you live.
Back to top
  
 
IP Logged
 
merle ward
WR Noob
Offline


WR Rocks!

Posts: 17

DeRidder, Louisiana, USA
DeRidder
Louisiana
USA

Gender: male

HF cheapie
NOVA 1624II
Re: Problem using water bassed Minwax poly
Reply #14 - Sep 12th, 2018 at 8:08pm
 
Well, I didn't get to do anything to my bowls today.  Heard a loud noise this morning, went outside to find dead oak limb sticking in the roof. Spent most of the day repairing the roof. 

Tom, where do you get the General Finishes?  I've never used a sealer before, so how do you use it?  I do like a shiny gloss finish even if some say it looks like plastic.  My wife says she likes it too so that settles it.  Thanks for the info.

Ed, we are on a rural water system for the house and also have a well that we use to water plants and other outside use.  Thanks again for the distilled water tip.
Back to top
  
 
IP Logged
 
Pages: 1 2 
Send Topic Print