The goal was the striker's fourth since his summer move from Cork City and Coppell believes there is plenty more to come from the 22-year-old.
"The lad has come from nowhere," he said.
"Three of us went to Ireland to look at him at different times and then we just decided to take a chance on the player.
"I can't really remember what it was that I particularly liked about him. I had five pints of Guinness in the afternoon and it was all a bit blurred.
"He has taken his chance and the nice thing is he's what I call a low maintenance player.
"He comes in, trains and then goes home. He has no ego and he's a lovely lad."