Hardning Enamel

Steve@Advance

Well-known Member
I'm sure this has been discussed here before, but paint is not my expertise, so please bear with me!

I've been working on an old Cincinnati OD grinder, disassembling, cleaning 60 years of grinding grit out of everything. Getting ready to touch up the factory paint. The existing paint is not too bad, just some battle scars, normal wear areas. I want to preserve as much of the original paint as possible, as it is a very tough, hard surface, better than anything I can go back with.

I've done these before but used rattle cans. The color never matches and it quickly fails due to the harsh environment. This time I bought a quart of oil base semi-gloss enamel, had it color matched. My plan is to use a small brush to spot the bad places. This doesn't have to be prefect, just presentable, it will get filthy again.

My question is, how can I make the enamel dry to a more durable finish? Will thinning it with lacquer thinner help? What about hardener, never tried it, any good?

Thanks!
 
Almost anything you thin paint with affects the integrity of the paint. No on the lac thinner. Yes on the hardener. Use 1-Shot hardener for enamel. Read the can and use gloves as it is very toxic. Throw away everything into an outside garbage can. Cheap art store brush or several small sponge brushes. { The sponge brushes tend to fail in use with enamel as the sponge comes off the handle.]
 
Never thin enamel with lacquer thinner. It's too strong of a solvent for enamel. The strongest solvent you can use is naphtha however brushing it you shouldn't have to thin it at all.

If the paint has dents and scrapes you might mask around the void and fill it with bondo. When dry if you sand the spot until the tape starts coming off you can remove it and finish sanding it level. Then put primer on the bondo and touch up the spot.

What color is the paint? If the color contains red you will have problems with the touch up spots fading. The enamel won't be as colorfast as the factory paint. A enamel hardener will help the hardness and colorfast of the paint however will be a minimal improvement.
 
Thanks, I'll get some hardner, see what happens.

I'm not getting real fancy with this, the customer just wants function, I want to give them a little extra pop for their money.

Thanks again!
 
Important notices:

As stated lacquer thinner will curdle enamel
Only use the stated amount of hardener, to much and it will be brittle.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top