As mentioned..   3x not a charm here.

I have this isseu every time.
Clearcoating without gelcoat would be an option. But allso that isnt easy with small holes like this.

Now i used gelcoat. Hoping it would help.

Gel had cured at 25 degrees for 5 hours was dry to touch.

I used 3m high tack clear spray adheasive to hold the fibers in place. (AS LITTLE AS POSSIBLE)


on the vacuum catch pot the dail says my vacuum is 100%
I leace the pump running over night.  In the morning when the resin is hardned the vacuum line form the ez composite starter kit to the pot is flat from the vac. 

(I dont have an official cacuum pump.  I use a 35l/m fridge pump. Whitch seems to work fine.   I can add an extra pump if i need more cfm...)
If my vac is to strong.. i can make a bleedvalve to reduce vacuum.   

But idialy i would love to have a perfect finish.

I use easy lease release agent..  denoulding is a breeze..

I am not sure from the picture what is going on but it sounds frustrating!  Infusion is the worst!  There are a few things:

If you don't have leaks and can confirm with a drop test as Hanaldo describes then that is good!   Leaks are almost always the issue though and they are subtle sometimes.  It really doesn't take much!  Is the defect uniform or consistent across the multiple parts and part surfaces? Do you have any pictures of the infusion plumbing setup?

Other problems that can cause this are too fast an infusion over-running air or air bursts during or after the resin is infusing.  Even a little glug of air in the feed tube will mess stuff up in almost un-fixable ways.  This part should take maybe 10-30 minutes with epoxy.  

It is possible that without a vacuum break detail you are sucking out too much of the resin with full vacuum during cure.  Especially with an envelope bag, you need to have a very minimal path from the part to the vacuum side.  You want air to pass but not much - or any - resin.   I am not as convinced as Hanaldo that you need 100% full vacuum for infusion.  You need good vacuum, but often it is just fine to infuse at 25inHg or so and it has several benefits.  I also really like the idea of reducing vacuum during or after the infusion to keep things less vapor-pressure sensitive. I doubt moisture is the issue but it's possible if you have old hardener... 

Do you have more pictures?  This should be figure-out-able!