i primed my lip with plastic primer, was clear not grey so i decided to change to the grey primer just to be safe since the guides use that.
i sanded off what primer i could but i dont think i did good enough cos i sprayed primer (grey one) and i can see cracks. would the original primer be causing this? or something else?

+ could i have just used paint stripper to get the original primer off or....? thanks in advance