Upon searching for further Gundam models, I came across unusually good looking Gundam models that looked even better than the ones displayed from the box. Later did I discover the art of painting, marking and other ways of polishing Gundam models. I wish I could have discovered this earlier and produced better results. So for those who are starting at the hobby, I strongly suggest learning and applying these skills out on your Gundam Models.
Perhaps, this skill has the largest impact on your gunpla's looks. First, it eliminates the obvious plastic look from your model. Producing a better color, texture, and matte finish. Painting can be done with or without a primer (base or surfacer), but doing it with a primer can prevent the paint from chipping, bulging, or cracking. The best part on painting your model is that you can customise its color. Personally, I also like the fact that it's taking me longer to assemble a model preventing the itch to buy a new one so soon.
As was mentioned earlier, the concept of using a nipper or clipper to cut the parts cleanly and filing them for the smooth finish was unknown to me. Usually, using a clipper or nipper is enough to get a clean cut of the parts without any excess. Filing, in this case, is used to erase lines that indicate where the connection is. Using cement makes this more effective. The downside is that, you may have to repaint the parts that you need to file. So the best strategy is to look at the manual, how the parts go together and look for the parts that will need filing. From this point you can prioritize what to do first; will painting it before filing be feasible?
Another neat trick that is worth learning is marking. There are Gundam markers available out there in the market available in many colors. Using a Gundam marker is easy, all you need to do is to mark the ridges on the face, arms, legs, and in any parts you think it would look good. Highlighting the ridges can really make a difference and make your Gundam look more alive. Marking is done after painting.
These three techniques can already make a great impact on your Gundam's appearance. Be sure to master these skills as even Gunpla masters use them. You may, however, find all these extra materials expensive, so be sure to check for promotions like Gopher Bob coupons to reduce the cost of this otherwise expensive hobby.
Disclosure: Monetary compensation was received for this post, however all opinions are my own.