Water Rockets

Anybody?  What’s the dope on these boards and this label.  Kevin Costner??  Made in the USA, but where???

Can’t quite make out this signature??

I found a Greg Nenson here: https://www.ebay.com/itm/Vintage-Surfboard-Spectrum-Surfboards-Greg-Nenson-shaper-/262488588913?_ul=BO

Also found this when looking for “Water Rockets”:

Same design as the board I have, but mine is in much worse condition .  Mine will become a sign.