ZEAL's wood plug will crack. Pictured is lure created and used since 1995, old enough to drink - the lure is 27 years old yet continues to be an extremly productive lure in this anglers toolkit.
Please note that the wood used in the production of these baits is of EXTREMELY high quality; however, due to the natural expansion of the wood, the paint will naturally break down.
This is not a defect; it has been a celebrated quality of the lures since the company was founded in 1981.
Consider the superficial breakdown of the lure akin to what anglers have been doing to their own baits for centuries. From scuffing a new chrome rat-l-trap to sunbaking a lure on your dash to achieve that perfect fade - it's a simple fact: well-used baits present a weakened forage and an easier meal in the eyes of a bass.
(20+ year old chrome r-l-trap from bassresource member Captain Phil - in regards to his most succesful lures)
A successful bait in your tackle box tells a story from bite marks from fish caught to sun fade from time well-spent on the water - much like how "bass thumb" isn't so much of an ailment as it is a badge of success and pride.
ZEAL lures in many ways are an expression of the Japanese aesthetic of shibiu or the embrace and celebration of subtle imperfection. They are the brave totems that your veteran battles are memorialized into - and that small piece of wood will tell you many things and will continue to remind you of the memories of fishing with friends and catching monsters (dinks too). True ZEALers embrace change.
That being said, choosing to maintain your topcoat is actually very simple - and an ounce of prevention can preserve the baits appearence.
All you will need is super glue (nearly any brand will suffice though I prefer not to use the c02 style as it isn't from my experience that longevous) and Devcon 2-ton epoxy.
On the baits I am most concerned about maintaining I will remove all hook hardware and mix up a quarter sized spat of Devcon and give the bait an even coating with a nice flat brush. 
Before and after (nail polish wiped away with paper towel as visual crack filler, followed by a Devcon coat with a few splashes of glitter for fun)
Devcon self-levels brilliantly so as long as you have evenly worked top to bottom, all brush strokes will smooth off, giving you a perfect finish. Let this cure for at least 24 hours (ideally 48) then put a dab of super glue on the threads of the screw-eyes before screwing them back in.
Often however a crack can be simply stopped dead in its tracks with a quick application of super glue though be wary of applying it to a black bait because it will whiten the area around application.
ZEAL recommends using Bondic liquid plastic adhesive; while I do not have personal experience with that product, I imagine it would provide fantastic results as well.
If repairs feel too intimidating I am more than happy to repair your lure myself or apply a Devcon coat to your bait before it ships, just drop me and email and lets talk!