That would very much depend on what it is you are trying to glue the balsa wood to, if you are gluing it to another...
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Metropolitan BoBo No.9 Metropolitan (John Milton)
204 H.P. 0-6-0 Drewry Shunter Builds a static model (non-motorised) not intended for conversion. Requires assembly and painting
Deltic Diesel Kit, HO/OO scale
Diesel 0-4-0 industrial shunterType RK 20B