Fairly new to all this skinning business etc, all the parts ive done so far have been just skinning, I am taking on a project to do a motorbike fuel tank. would it be beneficial to vacuum bag this tank to ensure the fabric stick to all the edges and curves properly? if so, any tips for bagging would be greatly appreciated! I have a bagging kit and vacuum on its way from easy composites. thanks in advance!

As long as the tank was sealed and you werent evacuating the air from the inside of the tank, the pressure would be even on both sides of the walls and you wouldnt crush it. Should be possible to completely seal a fuel tank.

That said, vacuum is completely unnecessary for skinning and generally causes more problems than it solves. Use the tack of your base coat to ensure the carbon stays in place and that is all you need.