Just wondering if anybody had any information on Thornliebank FC who were beaten 3-0 by Queens Park in the 1880 Scottish Cup Final because I can find nothing on the web?

Not a massive amount unfortunately, but they appear to have been SFA members from 1875 to 1907, entering the Scottish Cup 15 times in that period, 14 times in a row from 1876 to 1889-90 but thereafter a Qualifying Cup made it harder to reach.

I've got the following information on my site

THORNLIEBANK
Town Thornliebank
County Renfrewshire
Formed 1875
Disbanded 1907
Colours
White shirt, navy shorts 1875-1884
Black & white hoops 1884-1907
Grounds
Deacon’s Bank Park
Summerlee Park
Scottish FA Cup entries 1876 – 1890, 1894 – 1908
Leagues competed in
1897-1901 Scottish Combination (replaced Hamilton Academical during 1897-98 season)
1902-1906 Scottish Combination (expelled during 1905-06 season)
Honours
Renfrewshire Cup 1879, 1880
Renfrewshire Victoria Cup 1903, 1904
Notes
Record Victory – 14-0 v Bute Rangers, Scottish Cup Second Round, 29 September 1883
Record Defeat – 1-10 v Abercorn, Scottish Cup Second Round, 28 September 1889

Also, a club called Thornliebank Juniors played during the 1890s, disbanding in 1898, but it's uncertain if the two clubs are related.

After what appears to be a break of three years, they re-entered the Senior arena by entering the 1893-94 Renfrewshire Cup. Thereafter they entered the Scottish Cup via the Preliminary and Qualifying Cup stages.