Sorry forgot to say this is just wet lay up then bagged

If your bag is 100% holding vacuum then run more resin into the part at the end of the infusion. If its a small part you might have infused it too quick.  It is quite easy to leave the vacuum pump on too long after clamping the resin feed and hence sucking out loads of resin.

this is the second attempt at this part, same problem each time, seems to have dry ares or air voids.