what will be the gst

Gulshan Agrawal (Student Others) (122 Points)

14 September 2018  
Sir our business is of auto parts of car and jobwork on cars
we purchase car parts n aceesories in 18 or 28 % slab and sale it in same way
But we also do
... Jobwork on car... In jobwork we used to paint...the car..
N gst jobwork of cars is 18 %
N in this jobwork we use paint material which is consumed and comes in 18 or 28 %
But we make a bill of 18 % of jobwork
And claim the itc of paint

So i want to know.. Is it correct? Or what we have to pay extra gst on paint..
Or we have pay gst only on jobwork?