Kastel continued to promote Brandtner 's work over the following four decades .
A close friend of Brandtner , Montreal art dealer Paul Kastel , of the Kastel Gallery , was named executor of Brandtner 's estate .
art dealer continued to promote Brandtner 's work over the following four decades .
A close friend of Brandtner , Montreal art dealer Paul Kastel , of the Kastel Gallery , was named executor of Brandtner 's estate .