Chris, use a very fine grit, 8000 or higher to prepare your plastic. Prime then sand again with 8000 or higher. Fix any spots where the plastic is visible and then sand to get a smooth surface.
Fine coats of colour, 5 mins apart in hot weather, 8 to 10 in cold weather, build up your colour coat by coat getting wetter as you go. (Slowing down your hand movement will get a wetter covering). 5-6 coats are usual with most paints. Sand your colour down when finished with 2400, 3200, 4000, 6000, 8000 then 12000 grit. Get rid of all the uneven surface. Use very small pieces of sandpaper so you have more control. Stay away from edges. Wash down with water then dry.
You need to then put any decals on.
Clear coat. Start with a very fine covering, this will stop the decals from reacting. Wait 5 minutes, then put a second coat down, 5 minute wait, third coat getting wetter as we go, fourth coat and if needed a fifth coat. Avoid 'soaking or getting too wet' as this will make the clear coat sag. It won't 'run' like colour paint.
When you have finished the clear coat let it dry completely for three days. Keep it away from dust. Do the same sanding with the clear, remember, don't lean on the sand paper, just glide it over the surface.
Polishing, I use Tamiya polishes, 3 grades with Tamiya cloths.
Having said all of the above I am still learning myself so we can work together on this one. I know how it is done, the skills I am still learning.
Sorry, I forgot to say ALL sanding should be done with wet sandpaper, dipping regularly in water to keep plenty of lubrication present.
22. November 2019 at 00:34:55