Covering is not easy to get perfect , takes a little practice , but is so easy to repair it really doesn't matter ... 
On the panels you have , I’d try soaking the bubbled areas with a wet towel over the top , which will soften the glue ... then try ironing the bubbles down with a damp cloth under the iron. Carefully !!! Don’t use so much heat that it melts the foam .... and as with everything else around here , you might want to test that on a piece of scrap first ...
and as usual please take pictures 
