I am useing 1 layer of easy preg for what is seeming to be a very awkward part to get Wright . As the description says for use of the easy preg is to oven cure for ten hours at 100c ' I have followed this instructions but 5 parts later I am still getting generally the same outcome of the parts. I have been looking on the forum for information of people with the same problems . What keeps popping up is a lot of people are talking about ramping up and down in the curing process. 

The slow ramp rate and dwell periods are pretty important if you want a decent finish, the 1st lower temperature dwell period allows the resin to reduce in viscosity so it flows but doesn't cure then the higher temperature does the curing.