Don't use Windex it dissolves the glue on some coverings. Washing up liquid at the sort of concentration you would use for dishes worked for me. Rinse off with warm water at home. DO NOT POLISH WITH A SILICONE SPRAY. Nothing will stick again.

For a plug the OS 8 or Enya 3 will work just fine.

Buy some new fuel. and a couple of spare props.

Elmers will work just fine if you can let it set overnight. For field repairs a bottle of thin cyano, I like Zap, some 5 minute epoxy and a roll of parcel tape[ brown is OK but there are other colors]