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Old 04-28-2012, 06:32 PM   #1
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100% Thinning With Pentrol


Greetings all.

Ever have a morning where your brain was disengaged from any rational thought process? That was me this morning.

Instead of thinning with paint thinner or turpentine, I grabbed a can of Penetrol and used it to thin some Benjamin Moore Fresh Start Primer (oil-based) for spray application. Not sure exactly, but the paint was probably thinned 70-100%.

It's been drying really slowly, which is what Penetrol is supposed to do to paint. But it's been a six hours and it seems that it's hardly dried at all.

The obvious question is, will it eventually dry or just go ahead and remove it now and start all over? If the answer is let it dry, how long are we likely to be looking at?

Thankfully it was just the backside of a few cabinet doors. Whew!

Thanks all.
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Old 04-28-2012, 06:51 PM   #2
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100% Thinning With Pentrol


50% would be equal parts penetrol/ paint- 100% is all penetrol.

No matter what you used, this would be wrong.
There is NO reason to use terp BTW. None. It is ancient history.


I think you put it wrong.
And what were you spraying with all penetrol?
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Old 04-28-2012, 06:58 PM   #3
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100% Thinning With Pentrol


Thanks for the reply.

O.K., probably 45% Penterol, 55% Benjamin Moore Fresh Start Primer (oil-based) was more like it.
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Old 04-28-2012, 07:05 PM   #4
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100% Thinning With Pentrol


What were you thinking?
10% makes it like water...
Put a fan on it and see what happens.
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Old 04-28-2012, 07:09 PM   #5
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100% Thinning With Pentrol


The instructions for the Wagner Sprayer I was using suggested thinning unti the paint flowed out of the test cup in 30-45 seconds for oil-based primer. I just kept adding Penetrol untl it got there.
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Old 04-28-2012, 07:14 PM   #6
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100% Thinning With Pentrol


What were you spraying?
Have you ever sprayed?
Did you use the Wagner "spit- o matic" sprayer?

Sometimes spraying by someone who hasn't had any instruction on how to is not a pretty thing... just saying..
But on a positive note- when the pene does dry you'll have a sealed surface ready for whatever.
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Old 04-28-2012, 07:23 PM   #7
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100% Thinning With Pentrol


Thanks. You're suggesting it will dry. Eventually.

I was spraying a couple of cabinet doors with Benjamin Moore Fresh Start Primer. Will follow with 2 coats of Benjamin Moore High Gloss impervo 2 weeks from now when this stuff dries.

Yeah, I've had reasonable luck with this Wagner Control Spray. Yes, it does spit. Not a bad finish but not exactly great. Sort of an orange peel texture but not badas opposed to what I know i'll look like brushed (by me).

Thanks again.
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Old 04-28-2012, 08:13 PM   #8
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100% Thinning With Pentrol


what i would do. that is if you still can is wipe off the primer with a rag with some paint thinner . i cant see any integrity that would be left in the primer coat, could possibly have bonding issues. its your foundation coat it has to be right imho
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Old 04-28-2012, 11:01 PM   #9
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100% Thinning With Pentrol


Quote:
Originally Posted by slowdry View Post
The instructions for the Wagner Sprayer I was using suggested thinning unti the paint flowed out of the test cup in 30-45 seconds for oil-based primer. I just kept adding Penetrol untl it got there.
Wagner Control Spray - that's the little Wagner HVLP. A little late now, but for future reference. For oil base products, I tend to ignore the little viscosity cup and just add thinner and test until I get a spray that resembles one from a rattle can. I add one capful of thinner at a time. Usually only takes about one capful. I have never used Penetrol so I don't know how it affects viscosity. I've used Floetrol a lot on latex paints and it seems to have less effect on viscosity than an equal amount of water does on those.
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