Its not too old mate ( 55 is the max ) but I've said this a few times, getting a visa as a scaff is impossible, its not a trade out here, its done by joiners mostly, things are changing but it will take time, there are other options to getting to canada, but you need proffesional advice, anyone trying to get thru canadian customs for a work permit will be disapointed. They use layher and tube and wedge clamp ( out west mainly tube and wedge )