Help begginer, Air raid

hi everyone, I'm not new to the site but I am when it comes to kitbashing, I was thinking since theres going to be a universe silverbolt that I would like to have a classics Air Raid. His alt mode looks exactly the same as the seeker mold, so i was thinking of just repainting my starscream mold.
However i haven't triend anything like this before, so i was wondering if anyone here could give me any tips, ie what paint to use, any techniques to use etc.
Any help would be much appreciated, thanks
However i haven't triend anything like this before, so i was wondering if anyone here could give me any tips, ie what paint to use, any techniques to use etc.
Any help would be much appreciated, thanks