2005 nuevo shower tray

Hi all have had a very busy year minding grandchildren, but have still managed two really good trips with Heidi.  Four weeks on the Outer Hebrides were spectacular, only used the raincoat twice.  Second to the Somme,  amazing, emotional trip of 5 weeks.
Just giving Heidi the thorough clean she deserves and have noticed small cracks in the shower tray!!!  Have Creeping crack cure, but not sure if this is advisable?  Does anyone have any other solutions please?   

There are companies that will coat the tray .

Speedcoat.

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Thank you so much.  Will give their website a look and hopefully get a repair.
Grateful for all/any advice, had her 2 years and still know so little.
Thanks again . B.