In a small bowl, combine your lime and orange juice, seasoning, sazon and Kosher salt. Set aside.
Cut each chicken thigh into 8 cubes. Toss into bowl of marinade as you go along. When all the chicken has been cut, massage marinade into chicken. Let sit overnight, no less than an hour if you're in a pinch.
Soak skewers in water for minimum 30 minutes.
Place 8 chicken cubes onto each soaked skewer. Place on grill for 15 minutes, lightly bathe skewers in bbq sauce, cook another 5 minutes, slather another coat of bbq sauce. BBQ sauce should have slightly charred.
Serve on skewer with a slice of french bread on top.
* Sazón is a Puerto Rican pantry staple. These days, it can be found in most supermarkets like Safeway. There are several Sazón blends, but I always use the one that says "con culantro y achiote." It contains achiote, which is considered the poor man's saffron. It gives your food that vibrant orange color and a slight musky flavor.
For the guava BBQ sauce
In a saucepan, combine all ingredients and bring to a simmer. Allow to simmer for 3-5 minutes.