Polyacrylic over Shellac

[bpitch]

Hi everyone!

I have researched around but couldn't find any valuable info on how a combo of Poly over shellac (de-waxed) performs.
I have tried it for one project of mine ( high performance Poly by GF over Zinnser's Bulls eye ), and it does gives a very nice finish, so my question is if anyone has ever done it before and how does this bond performs in time?
Anything helps!

Thanks in advance,
Yuri

 

[PaulMarcel]

I've put Polyacrylic over shellac many times with no issues.  Shellac is the universal undercoat.  Since Polyacrylic is crystal clear, a nice amber shellac adds warmth if that's what you're after.

 

[nickao]

I totally agree. I have put many types of coatings over shellac with no issues. I can't think of one that didn't work.

 

[deepcreek]

I just did some butcher block countertops with General Finishes High Performance Waterborne poly topcoat over a spit coat of Shellac.  The folks at General Finishes said using the High Performance over a light coat of Shellac was fine but avoid applying it over a built up Shellac finish.

 

[PaulMarcel]

I just did some butcher block countertops with General Finishes High Performance Waterborne poly topcoat over a spit coat of Shellac.  The folks at General Finishes said using the High Performance over a light coat of Shellac was fine but avoid applying it over a built up Shellac finish.

Good point; mine was always a light seal coat of shellac usually as a barrier between water-based color and the water-based finish.

 

[bpitch]

I just did some butcher block countertops with General Finishes High Performance Waterborne poly topcoat over a spit coat of Shellac.  The folks at General Finishes said using the High Performance over a light coat of Shellac was fine but avoid applying it over a built up Shellac finish.

That's pretty much what I am doing. I have stained the wood, applied 2 coats of shellac seal , and 3 coats of poly over the latter.
I hope 2 coats can not be qualified as a over build up

BTW, did anyone experience problems with a Minwax Paste finishing wax? I have rubbed gently with a 2000 grit paper, applied some wax, and was rubbing for like 20-30 minutes and still can't make it shine. I bet people who can make it shine with a a hand rub can make Stallone feel jealous of their muscles ( maybe it is designed to be used with a polishing machine???)

Thanks again!

 

[Jesse Cloud]

Wonder what the difference is between a light coat of shellac and a build up.  Seems like the chemistry should be the same...

 

[Scott B.]

Bullseye is the only sanding sealer I use. And I use it alot. I use it under stains sometimes, and over stains at other times, depending on formulations. I like to lay it on heavy to completely seal the grain, and then sand smooth to 180-220 so poly glides on it.  My favorite clear to put over it is Zar Ultramax satin, which is a waterborne oil modified urethane. I would avoid Minwax polycrylic because it is not so good.

 

[tjbnwi]

Try Zinnser Seal Coat. Works very well. No bond issues.

Tom