Big Update!
For practice and gun setup, I sprayed a single stage metallic Meteor Gray on a fender and front bumper for my daily Hyundai. I read after I bought it that you can't sand metallics and it is not recommended for amateurs. Oh well, it was only about $40 from TCI Global's The Restoration Shop. I picked up an $8 paint gun stand from HF, so I had something to hold it when filling the paint cup. Also a $6 painters coverall from Wal-Mart.
My first coat was too thick, spraying metallic dark gray on black primer made it hard to see the paint go on. Plus I was fiddling with the volume and shape controls on the gun. Note the hanging cardboard used as target practice. So I got orange peel right away, but no sanding metallic so I just sprayed a second lighter coat on after the flash time for the 1st coat passed. It gave me the practice I needed in using the gun and mixing the paint, using the respirator etc. I had the parts up high off the floor on plastic shelves that worked great as stands. A dolly underneath, and even the doors rolled around easily.
Surprisingly, the single stage metallic came out really excellent, aside from the orange peel. It's even, shiny and smooth, no drips or runs, the metallic particles are very evenly distributed. I marked this as a win - except the color was so dark I can't use them on my light gray daily. Hello craigslist....
I painted the 240SX front bumper & SOHC lip years ago with a rattle can and clear coat, but it was too humid and it cracked and orange peeled badly. I sanded a lot of that off, then hit them with high-build surfacer primer from a spray can, sanded with 400 then 800, hit 'em again in a few spots. Then red 3M scuff pad and it's ready for sealer primer.
The color-matched sealing primer went on great using the Harbor Freight gun. Again no splattering, drips or runs, very even coverage. There was a lot of paint dust in the booth, fan filters and on the floor. After 2 coats of sealer primer I hit everything with a gray 3M scuff pad for good measure. This is not technically required - sealer primer is a "no sand" primer if desired, unlike surfacer primer which must be sanded before covering.
So at this point, I mixed up some base coat and sprayed it on the hood and doors. 2 medium coats, 20 minutes flash time between coats. The large surface area hood was difficult to cover - I kept seeing stripes of missed areas. But it eventually covered nicely, and the doors covered great. 1 hour flash / drying time and I went in for an inspection. I saw a lot more trash, dust and crap in the finish than in the primer, but it was acceptable. The darker final Indigo color was looking great!
One of the doors had a small area of roughness, but it was minor so I sprayed base coat on another batch - the fenders and rear center garnish. Once you spray base coat, you have 24 hours to cover with clear coat or you have to scuff the BC and respray it.
The rough patch on the door was showing up all over the rear garnish and fenders - really badly. Turns out it was a combination of being too cold, too heavy of a coat, and not long enough time between coats for the solvents to flash off. 'Lifting' 'scaling', 'wrinkling' - the technical term is "solvent under substrate". OK, so common, not from something coming up form under the primer - all I had to do was sand it off, respray the BC and then spray the CC.
But it is too cold, and the booth is filthy. I had purchased 1 quart of colored sealer primer and I actually used almost 3 quarts. This is 2 medium light coats of primer, of course I had an extra trunk and the body kit parts but it still was 3x more than the paint guys expected. The HF gun wastes paint like crazy according to the paint store guy, and I can see it all over the booth and in the fan filters. This was causing the extra trash in the base coat. I needed to replace the booth plastic before spraying anymore.
So I decided to wrap it up for the winter and I will get back to the base coat / clear coat / color sanding / buffing in the spring! Questions, comments, suggestions all welcome. PS the floor cleaned up nicely with a pressure washer.
