I thought I was by myself when it comes to my discontent with MM Acryl, seems I am not alone gobears01. I have the same dificulties with it, specifically, I can't get it to spray consistant fine lines for more than 5 seconds when airbrushing my modern jet camo schemes! ARRRRGHH!!!!. Tried all the popular alternate and house-brand thinner for MM Acryl with no relief. My solution, I donated all the Acryl and stocked up with Tamiya. Boy what a difference! It thins beautifully with a 50/50 alcohol/ water mix and it cleans up completely with good ol' Windex. Fine lines are a breeze, consistant and predicable spraying characteristics with very minimal "tip-dry", if at all. For brush painting, I mix in a drop of alcohol/ water into the paint color. A small amount of dish soap added retards the rapid drying of the paint. To solve the dilema of weather to use a primer before painting with acrylic, I thin the first color coat with Laquer thinner. Yes, you read this right, laquer thinner! Laquer thiner can thin Tamiya acrylics beautifully- sprays like silk, and bites the underlying styrene like enamels, providing a very durable film. This is great becuase I can now use masking tapes over it with no fear of pulling up the paint layer underneath. For the rest of the colors, I simply thin the paint and airbrush normally using the alcohol/ water thinner. For over 20 years, I was a die-hard enamel user. Nowadays, Tamiya has help me produce the most realistic 1/72nd scale replicas in my modeling career, with an acrylic paint! Try the methods I've described above and good luck. Happy modeling!
PS: My total (almost) acrylic finishing supplies:
1. Paints: Tamiya (all colors)
2. Paint references: Flyttblocksv Urban Fredrickson's color matching reference
3. Thinner: 50% alcohol + 50% Distilled water + dish soap(retarder)
4. Airbrush & Tool Cleaner: Windex
5. Special Thinner: Laquer thinner (for thinning Tamiya acrylic for super strong adhesion) primer color coat only. (2:1 mix)
6. Clear coats
(a) Gloss: Future floor finish
(b) Flat: Delta Ceramcoat, Matt interior varnish (waterbased, low odor, non-toxic)
(c) Satin: Delta Ceramcoat, satin interior varnish (waterbased, low odor, non-toxic)
7. Washes: Tamiya heavily thinned with water with dishsoap added (Sudge-wash)
8. Airbrush: Iwata Revolution HP-CR (general spraying), Iwata HP-C (detailing and camo outlining)
Greg Williams
Owner/ Manager
Modern Hobbies LLC
Indianapolis, IN.
IPMS #44084