Sound like you may not have a Scotchbrite wheel ?
I'd sooner cut a good sized lawn with scissors than debur an RV kit without one !
Seriously, if not then it's probably one of the best tooling investments you can make
Personally, I try to debur all the edges of all my parts. Once you have the right set of tools this is not too difficult ... but still takes time.
My rough process is
1) Break long edges and large diameter radiuses with a deburing tool (swisstool) or flat file
2) Get into corners with a round needle file
3) Use the scotchbrite wheel to finesse
4) 240 grit abrasive to finish. I know when it's done because I dont feel any risk of cutting myself on the part and cannot feel any nicks or irregularities in the edges.
Use your imagination on where cracks are most likley to form ... but pay very particular attention to critical areas (eg If you do an 'Emp kit 1st then anywhere around the H/S centre section)
As I said, it takes time ...... but you are building an
aeroplane