I have been painting cars since 1962....I am 64. I had a another totally different career....this stuff is my hobby. I have done newer car rebuilds (140 Honday Civics) and many rods and vettes, some of which were awarded Best Paint in some car shows. I have been from the old DuPont Alkyd based enamel (Dulux), R + M, Centari, PPG, Acme, Sherwin Williams, and all the laquers, and some I cannot recall to todays outstanding products. In short, todays paint is incredible. I have paint jobs out in the weather for the last 20 years. Some paints have held up, some havent. Based on my experience and the nice quality I want, my choices for my A I am restoring are as follows:
Sand/Bead Blasted/Clean Metal Surfaces:
1. Spray wax and grease remover on surface with a plastic spray bottle....wipe off. $20 a gallon, goes a long ways.
2. Thanks to a recent tip from Brent in TN, spray the surface with JASCO Prep and Paint. Its a metal cleaner conditioner and is sold at Lowes. Leaves great surface coating for maximum adhesion of primers, paint, fillers, whatever. $7 a quart, reduce it 100% with water. Wash off in 30 minutes with water...blow dry.
3. If the metal is going to be worked with filler or etc. immediately, do it on the bare metal. If it will be sitting a while, its best to prime to stop any surface rusting. Apply 2K Epoxy Primer to bare metal. I like DuPont, reasonable at less than $100 per gallon including activator. I also like the House of Colors 2K High Build primer.
4. Do whatever body work that needs to be done. I use only Rage Body Filler. It is $50 a gallon but worth every penny. Do not use cheepo filler. Not worth it. If I need any glaze filler I use the new Evercoat Metal Finishing Filler. It works really well and sands nicely. No pinholes. New one that just came out this month.
5. After body work is done, I use one of the above 2k High Fill Primers. Using sanding boards as long as possible (Durablock up to 30" wide) block, prime, block, prime as many times as needed to get TOTALLY flat surface. Use a GUIDE COAT of some type to guide your blocking. I either use the 3M Black Carbon Powder Guide Coat or alternate primer colors from gray to black each time to expose high and low areas. There is no substitute for hard work to get it RIGHT.
6. I let everything dry and harden for several days or longer before I continue with the painting phase. I want all the solvents evaporated out. Getting in a hurry will cause you nothing but problems later on in your finish.
7. I prepare the surface by sanding with at least 400 paper...wet blocking. Can be sanded up to 800 grit.
8. Sealer...I use Dupont Nason 2K Sealer or reduce down the 2K Primers and apply one or two coats of sealer. Sealer costs about $35 a quart including activator. Primers work just as well for me....great at no sand scratch lifting later on. I also lightly sand the sealer with gray scotch brite pad to remove any crap and nibs that might have gotten into sealer.
9. Base Color....I use either DuPont Chromabase or DuPont Nason Color Base to the car. A quart of Chromabase for A solid colors is about $75. The Chromabase is about $140 a qt. Activators are reasonable.
10. Clear. I have used all kinds of clear coats...from HIGH dollar to garbage. My favorites are either Dupont Nason 2k Clear (around $100 for gallon including activator) or Matrix MS42 High Solids Clear (about $200 a gallon for clear and activator). I am not convinced there is much difference between the two. The Matrix is probably more suited to the show type finish.
This is just how I do it. I am not selling anything. I am not criticizing anyone elses choices and processes. I am sure other products work equally well...this is what I have access to locally....plus many years of trial and error. I do believe that some paint companies have TOTALLY inflated the cost of the paints to give you the impression that a clear that is 5 times the price is worth it. I have used the HIGH ones...I am not convinced at all. I know some of our local body shops who do very good work have discovered the same things. A couple of them have moved to total water borne products now and are extremely pleased with those. They are not very practical for the guy like me with a body shop in his back yard to mess around in.
Good luck to whatever you do with your car. Only three other comments...
1. Do not use any lacquer based products in todays world of great new products.
2. With all your hard work getting your car ready to paint, dont throw that away by going to Tractor Supply and using implement paint.
3. USE A FRESH AIR SUPPLIED RESPIRATOR FOR 2K PAINTS WITH DYSYOCYONATES (sp) IN THEM. CARTRIDGE MASKS DO NOT PROTECT YOUR HEALTH!! I CRINGE WHEN I SEE THE VIDEOS OF GUYS USING THE CARTRIDGE MASKS FOR THE 2K PAINTS.
Hope this is helpful to someone. Thanks.