He said Barraclough went with "such velocity" that he didn't get a chance to write a piece to say goodbye.
"He would have. He'd've written of his love and admiration of his children, Justin and Nicole."
Luck said he would have also mentioned his post-Exponents career in Australian band Mental As Anything.
"He'd have let you know he has a ripping new album available, Duckshit."
Luck said there would be no funeral proceedings, as "David has just gone out to buy some strings".
Barraclough joined the Exponents in 1994. The Queensland-born guitarist was most famous for writing songs La La Lulu and Shouldn't Be Allowed.