I wouldn't say it looks like poo to use rivets. A lot of older suits were done this way as most folks just didn't know about the technique Paul describes. It will look fine, but the question is why use rivets when there is a more cosmetically pleasing, more accurate, and more secure way of doing this.
Fortunately for folks with suits with rivets, they're easy to pop off and you can simply get a replacement set and then do the method Paul describes.