Estapol Problems

I am attempting to repair slightly damaged Tasmanian Cherry Wood cupboard doors. The damage penetrates the finish through to the timber. Accordingly I sanded the doors smooth and in those places the damage reached the wood I sanded through the finish coat and what apperars to be sanding sealer into the wood. When covering all with Satin Spray Estapol white lines apperared around those areas where I had sanded through to the wood. Thinking it might have been a temperature/humidity problem, I resanded and ensured that the termperature was 20 degrees C. Same result.
I then removed all the finish including the sanding sealer and got back to the bare wood (not an easy task!) .
The problem that I now have is that certain areas of the timber cause the paint to coalesc into small bubbles and dry to a rough finish. It appears to be grain related in most cases. IE the boundaries follow grain lines.
Any ideas on fixing the first problem or the second. The professionals say that they have never heard of either problem before. I though Estapol was reasonably forgiving!

Could it be silicon from Mr Sheen etc, maybe when you sanded it was contaminated from silicon polish which then went onto the timber?

I have had a whole sheet of polyU peel from a table I made, because of silicon.
And it was 2 years after I made the table.

Al

The silicon thought from Ozwinner is a real good one and quite possible. The small bubbles and rough finish is most likely from grain torn during the sanding an can only be fixed by sanding it out, most likely back to the raw timber then raising the grain with either water, alcohol, or sanding sealer and when thoroughly dry sanding again lightly with a very fine abrasive to get rid of any raised grain. You can then apply the poly/u. Personally I would try a brush coat rather than spraying it.

Hope this helps a little.

Cheers - Neil :D

PS I have found polyurethane to be one of the least forgiving finishes available, especially when it comes to repairing it. :mad: