Speed tape
We used to use speed tape now & again on such things as camera pods on Harrier trials; it is very sticky & strong, but high speed at low alt' soon upsets it !
Would never dream of using it on a control surface, let alone on an airliner, unless in absolute extremis. For some people of course that would mean time & money...
The Indians have an 'inventive' approach, I was sent pics of an electrical distribution socket in a hangar subject to flooding - answer, screw on a large block of wood so it floats ! No thought of waterproofing the hangar.
Also chums were taken out to the a/c carrier in a helo which had suffered a major birdstrike on the canopy ; answer, chain-drill each side of the full height split, and lace it with electrical wire !
Despite all that, and the appalling record of the air force, the Indian Navy has proven extremely effective and has an excellent safety record with their Sea Harriers - some people I knew who were there reckoned they had the edge on the R.N, as they were less pre-occupied with B.S. & traditions.