Trying to figure out how to keep the bag to stay tight all the way through the infusion process. there’s absolutely no leaks before we start infusing the resin. But as soon as we open up the resin inlet line the inlet side/area of the bag loosens up and it really never get a tight until the resin starts to gel. Anyone have this issue or does anyone know how to fix this issue. I’m finding small pitting on the surface and only on the inlet side so i’m guessing g it’s happening from the bag being loose on that side.

Not quite the right conclusion there regarding acetone and clear coating. If the parts are fully cured, they are completely inert - acetone will not remove any resin at all. It can hurt the gloss retention and dull the finish a bit, which is more evident on the 'high' spots: the tops of the fibres. Once clear coated though, this should not be evident at all.

If you are discovering porosity during clear coating, it was there before the acetone cleaning and indicates a still slightly lean component, or potentially another issue. Infused parts are actually quite notorious for this, they can look so perfect straight off the mould and even with close inspection you often miss the tiny porosity with the naked eye. Once you start spraying clear it becomes very evident. 

I would suggest that your parts are still a touch lean, and if your customers are wanting them clear coated then increasing the resin content would spare you some work and improve the results. 

thanks for your feedback Hanaldo, Yes thinking the part wasn’t fully cured then because the acetone cleaning before clear coated actually didn’t open up more pinholes and dryness look before applying clear coat. We are demolding the part the next morning and cleaning and then spraying clear coat on them. I know some resins are not fully cured for a couple days ambient and of coarse adding heat can speed that up. How do you suggest getting a more resin rich part? Looking for a thicker face layer or resin if that’s possible without putting down a face coat prior to laying down the fabric, and not having to do any coating after the infusion process.

I would really like to sit down and watch exactly how you do one part, step by step, so I can get down to the bottom of exactly what we’re doing wrong. haha