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DAMAGE - Will shellac UNDER poly get cloudy if a hot mug is rested on it?

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Forum topic by gargey posted 06-23-2016 03:16 PM 1756 views 1 time favorited 21 replies Add to Favorites Watch
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gargey

469 posts in 239 days


06-23-2016 03:16 PM

Hi Guys,

I know a downside of shellac is that water or heat can damage it. On the plus side it can be repaired. But if you put a water-based poly on top of it to protect it, it cannot be (easily) repaired.

Here’s the question:

If you put (in my case water-based) poly on top of shellac, you will protect it from moisture, but what about heat?

Basically, I’m considering finishing a cherry side-table with a few coats of shellac and then water-based poly on top, but don’t want to risk “sealing in” damaged shellac if someone puts a hot cup of coffee on top of it.

Anyone have experience with this?

I know I could skip the shellac, but water-based doesn’t have that much life (popping grain) on its own. I plan to avoid oil-based because in this case I want to avoid the darkening/yellowing effect.

Thanks


21 replies so far

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gargey

469 posts in 239 days


#1 posted 06-23-2016 04:33 PM

Anyone?

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chrisstef

15668 posts in 2469 days


#2 posted 06-23-2016 04:37 PM

Are you honestly wondering why no one is responding to your post? If so, please reread your most recent comment on wahoos latest post.

http://lumberjocks.com/projects/87421

Do you even google bro?

-- rock, chalk, jayhawk

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TheFridge

5765 posts in 949 days


#3 posted 06-23-2016 04:42 PM

I hate trolls

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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gargey

469 posts in 239 days


#4 posted 06-23-2016 06:39 PM

chrisstef – just trying to keep the whole world from going insane. seems like some guys could post a picture of a turd and get 50 “wow great job!”

TheFridge – The word “troll” does not mean what you think it means.

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chrisstef

15668 posts in 2469 days


#5 posted 06-23-2016 06:59 PM

So you’re saying you’re the judge and the jury. Got it. Let me know where I can send you part of my salary. I certainly must owe you some tax money for your wonderful service to mankind.

-- rock, chalk, jayhawk

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gargey

469 posts in 239 days


#6 posted 06-23-2016 07:11 PM

I’m not bullshitting anyone. I’m truthful and direct. I don’t feel the need to post bullshit like this:


So you re saying you re the judge and the jury. Got it. Let me know where I can send you part of my salary. I certainly must owe you some tax money for your wonderful service to mankind.
- chrisstef

Sorry if you can’t handle a little bit of reality. Later.

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AlaskaGuy

2406 posts in 1772 days


#7 posted 06-23-2016 07:13 PM

Have you ever heard of coasters, trivets and hot pads????

-- Alaskan's for Global warming!

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chrisstef

15668 posts in 2469 days


#8 posted 06-23-2016 07:18 PM

We can all determine our own reality, I do not need yours to validate mine. I’m very capable of thinking all on my own.

Your truthful and direct comes off a pompous and arrogant and its got no place amongst many of the fine individuals around here from whom ive seen many wonderful acts of kindness. You should try doing something nice for someone besides yourself once in a while. It might loosen up those underpants a little. I think theyre squeezing a bit too tight.

-- rock, chalk, jayhawk

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bobasaurus

2667 posts in 2647 days


#9 posted 06-23-2016 07:28 PM

You could give it a try on some scrap and see what happens. I would probably not do the shellac and stick to just poly or some other heat-resistant varnish.

-- Allen, Colorado

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TheFridge

5765 posts in 949 days


#10 posted 06-23-2016 07:40 PM

Didn’t know trolls had feelings.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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gargey

469 posts in 239 days


#11 posted 06-23-2016 07:56 PM


You could give it a try on some scrap and see what happens. I would probably not do the shellac and stick to just poly or some other heat-resistant varnish.

- bobasaurus

Thanks, good suggestion, don’t know why I haven’t done that already.

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gargey

469 posts in 239 days


#12 posted 06-23-2016 08:01 PM


We can all determine our own reality, I do not need yours to validate mine. ... You should try doing something nice for someone besides yourself once in a while. It might loosen up those underpants a little. I think theyre squeezing a bit too tight.

- chrisstef

OK confucious. You’re the one who has a problem with me, is putting words in my mouth (judge & jury), and is trying to tell me how I should be. Not the other way around. So “I do not need yours to validate mine” is a little misguided.

Also, no one is forcing you to participate in thread. You chose to mess it up.

...

Oh and by the way, here’s another piece of bullshit:


You should try doing something nice for someone besides yourself once in a while.
- chrisstef

I’m not pretending to know anything about you, why are you pretending to know anything about me? Do you have a basis for making that statement? I prefer to argue on merits.

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CharlesNeil

1610 posts in 3334 days


#13 posted 06-23-2016 08:05 PM

to address the question, your correct the poly will handle the water, heat is a different animal, and nothing tolerates that really well, oil’s do best. To Get the warming effect of a solvent or oil, I personally would do a coat o or 2 of Arm R Seal, its a urethane and does super well, I would use gloss, just to avoid any streaking from a satin or Semi gloss.

Let is dry at least 36 hours, more if you can, it dries well and hard, then do a light scuff sand ( more of a wipe) with some 600, as long as it powders its dry , the do your WB poly and you should do fine. It in MHO would be better than shellac.

Now this will throw you a curve ball, but it works well, if your wood is blotch prone, then do a wipe with some water, just to dampen, then do the Arm R Seal over it,immediately , the water will prevent the oil from being readily absorbed, and help prevent blotching, I know it sounds like it shouldnt work but it , does, .. try it, you will see, I learned this quite by mistake. Good luck

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gargey

469 posts in 239 days


#14 posted 06-23-2016 08:13 PM

Charles-

Interesting. Water+oil sounds scary, but I’m not afraid to test it out and see how it goes. Cherry can be blotchy…

I like shellac thus far, but maybe I should listen to the chorus and only use it in low-abuse situations.

Thanks

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gargey

469 posts in 239 days


#15 posted 06-23-2016 08:18 PM


Have you ever heard of coasters, trivets and hot pads????

- AlaskaGuy

Do you expect family and friends to unfailingly use them? Would you risk hours of handwork knowing that ONE instance of failure could ruin the finish? Do you now understand why I am asking the (OP) question?

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