I am thinking of buying a fiberglass car that has a wider door gap than I like between the pillar (body) and the door. I am familiar with 'glass cars but not with filling the gap like this. I would think the door pillar would need to be built up with fiberglass? If I had an experienced guy do this, what are the odds of a successful repair? I mean, would this be a difficult job? The gap to be filled is on the order of 3/16 inch or less. Not real bad but it bothers me and if I cant do a good repair I won't buy it. It's still in gel-coat of that matters and was made six years ago. Any thoughts appreciated. Thanks in advance.