It is, but in most cases the job is best left to professional applicators since the materials and techniques to achieve an acceptable finish are unique. There are some products, such as here: http://www.aervoe.com/Merchant2/merchant.mv?Sc reen=PROD&Store_Code=A&Product_Code=145 (I'm assuming a similar product is avialable in the U.K.)
that probably can be applied by the DIYer, but the surface preparation instructions must be followed carefully... Best of luck!
If i'ts a small job you can. You have to give surface a good
quite fine sanding, clean surface.
You need a spray can of ETCH PRIMER, give a couple of coats then your ready to paint.