If its only paint chips and non structural use Selleys or Araldyte porcelain glue from Bunnings . It it a two part epoxy resin in a double syringe. It is white and a bit thicker than toothpaste . Pile it on the chips . Make a flexible squeegee to flatten it off . When cured , ( with water and sand block ) , wet and dry 400 grit . Too easy and very close to the color of most board white .
ps; If its the xcite ride in your pics , it will work perfect . Soft bendy plastic squeegee to bend around the curves.