Modern Vespa

Has anyone had any experience with using a flatting agent like Omni M148 in single stage acrylic enamel ? I have read that talc also works. I have both and could use the talc in urethane.
From what I understand, the issue is keeping it under suspension.
I am looking for a semi gloss/ satin effect. It can be done mechanically, and I have done that, but I have always wanted to try it right out of the gun.

We use a flattening agent at my work for PPG Omni. You can get anywhere from just under glossy to the flattest of finishes. Just add a little at a time and spray till you get the desired effect.

I am going to give it a try. Thanks.

It's the best way to go, super easy and since it's compatible with your paint you'll have no surprises.

Many years ago when i painted my jeep CJ7 with PPG, i also used a flattening agent on the hardtop. That was with base coat/clear though. Just remember to not ever apply a wax or polish to a paint if you flatten it out, otherwise it's going to look weird in some spots.

I can see that with a really flat finish but would it be a problem with a semi gloss or satin? It is my understanding that the affect is from refraction of light on the material within the coating. Like the flakes in a metallic paint.

I do not know about how a wax or polish reacts with all the different sheens, but i assume it's going to make anything that's less than a gloss more shiny? Perhaps there's some sort of dull coat was that's out on the market that's specifically designed for dull coat finishes?

For years I used primarily semi gloss, satin or rubbed finishes on the furniture and cabinetry I built. I think gloss on wood looks stupid. I do know you can't polish a satin varnish to shine. Also, the additive ( silica, I think) weakens the coating. High gloss is the hardest.
I am thinking now of just going with the straight paint and knocking it down with some 1200-1500 but I may try a sample of the additive first to see how it looks. .

Here's standard gloss on the right and 3 to 1 with the flattener on the left.

One part flattener to three parts (paint+reducer+hardener) ?
25% of the total mix ?

3 paint to 1 flat then treat that as the paint and add reducer and hardener as normal. 😁