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Polyurethane Finish?

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Posted January 16, 2013 - 09:16 AM

If all else fails, I was going to say you could sandblast it but not the fiberglass.



Edited by JRJ, January 16, 2013 - 09:16 AM.

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#17 JDBrian OFFLINE  


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Posted January 24, 2013 - 06:18 AM

Troy, was this a water based or oil based poly? The water based poly's are very clear, durable and you can buy them rated for outside use. The oil based ones tend to have a yellow cast to them which warms up wood finishes. It would be nice to have some extra durability on rattle can finishes. My experience is that they are not as hard as a sprayed paint finish.

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#18 Toolpartzman OFFLINE  


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Posted January 24, 2013 - 07:50 AM

My experience in a nutshell--I've used every topcoat made when attempting to seal cedar from greying

  1) Automotive clear-coat has UV inhibitors that furniture poly doesn't.

  2) Min Wax is great for furniture, but NOT labeled for floors because its not as durable.

  3) If used for a marine application check the label--I think as Daniel said Min Wax Helmsman.


   When comparing undercoats its best to try it over a sample to see if it works** . It may appear OK , but later

   flake off. Lacquer, Acryilic, Latex and enamel finishes these days have unknown chemicals that may not be friendly

   to topcoating.     And don't think its easy to remove from a part you want to save. It not. Hope this helps.


   ** It may take several weeks tto test it.

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#19 IamSherwood OFFLINE  


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Posted January 24, 2013 - 08:05 AM

Epifanes might have a product for this application. They have a website.

I've made many teak tables, coated them with 3-4 coats of West System epoxy, and then

the Epifanes Matte finish poly. Amazing stuff. Some of the tables have been out

there 5-6 years now, on the boats, outside. They may have a hi-gloss product.

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#20 johndeereelfman OFFLINE  


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Posted January 24, 2013 - 08:49 AM

Brian. the poly I have is oil based. One of these days, I will just have to try and see what happens. I figure if it does start to yellow, at least it will go right along with the John Deere color scheme, right?
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#21 Arti OFFLINE  

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Posted January 24, 2013 - 11:58 PM

I've used it on Canvas, Cotton,  Acrylics, Enamels, Base Coat that had the clear peeling, But mainly on old chrome,,


I discovered that if you clean Chrome that is just starting to get little specs of rust on it with steel wool and apply poly urethane on it it the little specs of rust don't come back. I've saved many a sissy bar, rims and luggage racks on old motorcycles with it.


If you want to see if it will react with the existing finish find a spot that isn't noticeable like the underside of a hood put some on it and wait for about an hour. If it is going to create a problem you will be able to see it that way.

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