Acrylic enamels.

I understand that (at least some of) the Case/IH paint is now an acrylic-modified alkyd enamel rather than a straight alkyd (oil based) enamel. And is better because of it. CNKS would know more about it and will probably add his thoughts.

Both PPG and DuPont still offer acrylic enamels in their automotive lines that do not require isocyanate-containing additives (hardeners/activators) but the field is getting small. In DuPont, Centari is a top-of-the-line acrylic enamel that is still available as a 1K product, at least in my area - but it is pricey nowadays for what it is. It is available in three different chemistries, only one of which is a 1K mix, so you need to tell your jobber that you want a straight acrylic enamel that doesn't require an additive (other than reducer). In DuPont's NASON economy line, there is Fast-Dry acrylic enamel that doesn't use a hardener. There may be some acrylic-modified alkyds in DuPont's industrial line but I am not familiar with those.

In PPG, there's the OMNI economy line that has an MAE acrylic enamel that can be used w/o hardener, however recoating after initial dry can be problematic due to the possibility of lifting. PPG's premium Delstar acylic enamel may still be available as a 1K mix in some areas - it was discontiued in my area some years back. If you can find it, expect it to be pricey like Centari. You can get PPG color formulas for various tractors here. PPG may also have some alternatives in their industrial line-up but I am not familiar with that.

You can also try Martin Senour (NAPA). I think they have 1K acrylics and acrylic-modified alkyds in their product lines but I am not familiar enough with those to identify any actual products. I believe that Sherwin Williams automotive products are essentially the same (with perhaps different names) as the Martin Senour products, so yes, you should check with SW if you have a SW automotive paint dealer in your area. The SW website might also be of interest to you. They should have some tractor brand formulas in their "fleet" listings under "color info". Martin Senour has an almost identical website.

Rod

I checked out PPGs website in their commercial/industrial line and found an ALK-200, tradename Tecstar, that is an acrylic modified alkyd enamel. It does not use a hardener. Perhaps that is the paint you have from PPG? Your dealer should have given you a complete technical data sheet for the product with it. However very few actually do that. The tech sheets contain additional usage information, along with some cautions that are not generally provided on the can label. If the ALK-200 is the paint you have, the tech sheet for it is here. If not, let me know what the product number/tradename is and I'll see if I can locate an on-line tech sheet for you.

The reference to "1K" simply means that it is a one component product that doesn't require another additive. The use of a reducer doesn't count as a separate product. A "2K" product is one that requires an additional component besides the basic color, such as a hardener or activator - again, any reducer is not counted as another product.

The use of paints with hardeners (contains isocyanates) are used a lot nowadays for increased chemical and fade resistance. All enamels using hardeners fall into this category as do all the urethanes. They are really no more tricky to use but are very dangerous to breathe. For health safety, they should not be used at all w/o the proper fresh air breathing equipment ($400 and up).

Yes, please post back your experience with the PPG industrial product, along with the actual designation for it. Some of us who post regularly here only use the hardened versions and have limited (if any) first hand experience with the non-hardened paints. I haven't used any non-hardened paint in many, many years. People have asked about it here (maybe more who read but never post) that don't wish to get into the expense of fresh air breathing equipment for painting one tractor - or risk their good health. They want something a little better than the tractor store alkyds but their options are now limited in the automotive paint arena. If you like the PPG industrial product you have, I,m sure others would be interested.

Rod