The difference between vac bagging and resin infusion is not so great, with infusion the stack is laid in the mould dry then a bag put over it and a vacuum applied, then a pipe is taken from the bag to a bucket of resin, the vacuum pulls the resin out of the bucket and into the mould, it is distributed around by a series of channels and the laminate is wet out, when it's all wet the pipe is closed off and it's left to cure.
With vac bagging it's all wet out first then bagged down to consolidate it, results are very similar, but infusion uses a bit more resin and is quicker.
You can't build f18s in pre-preg it's against the rules.
