“We dug deep and gave it everything,” said Scott. “To win a Youth Olympic gold is amazing.”
Taekwondo fighter McNeish, 17, is a former world and European junior kick-boxing champion and only switched sports last year.
He defeated Russia world junior silver medallist Soso Kvartskhava in the quarter-finals, but lost to the eventual Youth Olympic champion Edival Pontes of Brazil 12-6 in the semi-finals.
“I’m learning all of the time in this sport, but to come away with a medal is a good feeling,” McNeish told BBC Sport.
Rower Chris Lawrie, 17, also impressed on the third day of competition in Nanjing and will be expected to challenge for a podium finish in the junior men’s singles final on Wednesday.