Woodfinishers Weblog

Wood finishing forum for professional finishers

Full Grain Fill Finish produced with Pinnacle Polyester and Pinnacle Polyurethane

The subject of how to get that full grain filled high gloss / high polished look without over building a lacquer to the point that it cracks has come up from time to time. I recently had a customer who builds and finishes custom walnut tables to a mirror finish that are gorgeous beyond belief have a serious fracturing issue. He had been building up pre-catalyzed lacquer beyond what the manufacture recommended. While this had worked well in the short term, cracks and fracturing of the finish began showing up after a few months.

The best solution I have found for this problem is the use of polyester sanding sealer. This is a great system however it is not something that should be attempted by someone new to the business of furniture finishing as there are three components to mix and if not done right will never dry. Eight to twelve mils of this material may be applied in one application to fill wood grain and or pores and it won’t crack and fracture like lacquers and conversion varnishes do. This is the finish used on pianos.  Once you have applied enough polyester sanding sealer to fill the wood grain and pores you can then block sand it smooth and flat. You can then go straight to final sanding and polish if you wish. This would provide the hardest most durable finish. However, polyester does turn yellow over time. An alternative is to top coat the polyester with non yellowing lacquer or high grade two part polyurethane like the Pinnacle brand we have sold for years now. This polyurethane has UV inhibitors added to it to slow the effects of yellowing that are typical of polyurethanes.

Thomas Craven has been a finisher in the valley for many years and has consistently produced excellent products. He and his team have mastered the Polyester/ Polyurethane finish as you can see in this video.  You can reach Thomas Craven through his web site at:  http://www.TCWoodFinishers.com

If you are interested in purchasing these products you can contact me through the Annex Paint Store web site at: http://www.annexpaint.com

Greg Saunders
Annex Paint
greg@annexpaint.com

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December 7, 2012 - Posted by | polyurethane, speciality finishes, Tips and Tricks, Wood finishing | , , , , , , , ,

1 Comment »

  1. Thats a great post thanks for sharing

    Comment by najam awan | August 6, 2013


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