Bilal Hassun took 3/28 in 4.5 overs for Damani, who will complete the season 14-0 if they win their next three games.
Frank Akankwasa did damage as well with two wickets as the travelling Nigerians were all out for 154.
A tour of Nigeria is part of preparations for the journey. The boys remain equaled exceptional and motivated.
The defending champions are enjoying easy pickings as the season reaches the business end.
It is two games, two wins for the U19 Cricket Cranes.
Nigeria is a team in transition from an average side to a better team.
The former Uganda Cricket Association CEO, Ligyalingi is walking a new path in his new status as an ICC Africa Development Officer.
A versatile cricketer, Wapakhabulo holds the record as the first Ugandan to score a double century.
Gunathilaka was questioned by police on Tuesday about an incident at the weekend when his friend was accused of raping one of two Norwegian women.
A win against a weaker Jinja SS then would have given them the keys to the kingdom.