Mrs Brown ran a guesthouse in Ascot British Airways captain Robert Brown, 47, was convicted of obstructing a coroner from holding an inquest.
Brown had already admitted manslaughter by reason of diminished responsibility. He is due to be sentenced later.
The jury at Reading Crown Court returned its verdicts after nearly 15 hours of deliberation.
Killed with hammer During the eight-day trial the court heard Brown had been consumed by anger during the course of his marriage, and a pre-nuptial agreement signed in 1999 had caused him "continuing resentment".
When his wife filed for divorce, it set in motion three years of protracted legal wrangling which was still continuing at the time he killed her.
The court had heard how on 31 October he drove to the former marital home in Ascot to drop off their two children.
On arrival, and with the children out of sight, Brown began to hit his wife repeatedly around the head with a hammer.
Jurors heard he then bundled the children into his car, wrapped his wife's body in plastic sheeting and dumped it in the boot before driving to woodland where he had already dug a hole and put down a makeshift coffin.
Brown was arrested the following day after police were called to investigate the disappearance and discovered spots of blood at Mrs Brown's home.
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