Krylon.............. not!
Tried it and I recommend against It is NOT fuel proof and when in the hot sun it does get soft. It may be the primer, it may be the clearcoat (Lustercoat clear). I think if you are spending $100-$400 for a plane then splurge a little and buy better paint. I have used the Lustercoat with some success but the spray nozzles leave a lot to be desired. The spray nozzles on Century 21 brand of paint seems to be the best and the paint is about $1.00 cheaper.
.02 worth....