want to buy plain grey water base decal sheets anyone know were thanks

Micro-scale used to make decal sheets in various colors-- I've seen white, red and black recently at a model RR store in my area-- other colors used to be available but I haven't seen any lately. However, you can make your own in any shade you want by buying clear decal paper and airbrushing it in your color of choice-- I do all the time. I'm currently working on a "bare metal" project using silver painted decal paper-- keep the paint thin and it works great.
VR, Russ

Thanks very much for this info,this is for an older modeling friend of mine will tell him and he may give it a go,really kind of you,thanks for your help cheers.