make sure that the oven is completly clean if unsure evenly spread out a bucket of water and sweep around entire oven floor with a broom.
flat the primer with 400 on a d.a (dual action sander)but before you prime it put a dust coat of black over all the filler work and then flat down with 180grit paper on a block then as long as its all straight which you will be able to tell because if it isnt you will still have dark patches and they will either be high or low points if high then use a hammer and dolly to beat it down then put a small spread of filler to just fill in any in perfections you may of caused.Then key any tight areas up with grey scotch because as its a metalic you want the flakes to lay flat.

then blow it all off make sure you clean right in all the creases and every where dust could be lurking.Then one panel at a time panel wipe it making sure you keep wiping it until it all looks a matt colour then tack rag it off this and the panel wipe will get rid of any lubricants loose dirt and general crap.then mask out whole car.

now you can apply the etch to the bare metal areas and areas which have got filler should only take about 2-3 coats then give the whole car 1-2 coats of etch then straight after applying the etch let it jus settle which if you leave it whilst you mix the surface primer(2k primer) by the time you go back in it will be ready.
Then apply probally 2-3 coats of surface primer(2k primer)to the whole car.

Now just let it bake for 15-20mins.
take it out of oven and de mask it all.now start to d.a(dual action sander)with 600 grit discs.if unsure of your paint work skills apply a dust coat of matt black paint and went it all looks even you know youve achieved.once the whole cars primer is to your satisfactory then blow off,panel wipe and tack rag.and once again mask out whole car.

You can now spray colour and then laquer let the colour flash off for 5mins before applying laquer.then let it bake off for 25mins.

Once baked off take out oven de mask and start to flat it all done with either 1500 or 2000 wet and dry paper be very carefull when flating near edges you do not want to rub through.then when its all matt mop it up with advance liquid compound then a good wash and polish. job done lovely jubly