Spray-on paint hardener for enamel

I have a ABS plastic toy boat that I wanted to make look good
and last so I lightly sanded it and painted it with
Valspars Plasti-Kote spray enamel ...fast dry ""odds n ends "" paint.

the issue is it does not want to dry / harden
after 50 plus hours it still feels tacky and is very easy to mar /scuff
I have baked it for 4-6 hours at 90f and still no luck

what would / should I do to harden the paint ?
can I clear coat it ? if so do I trust the Valspars Plasti-Kote spray enamel
to do it ?( they have a CC )
thanks

k9000wner, welcome to the forum I would definitely clear coat it. However if it was me going through this experience with this product I would not use the same brand again for that. But, that's just me

thanks for your thoughts
would you have any suggestion as to what / whos
clear coat to use???

Not really, K9000wner. There are so many brands to chose from and I try to abstain from recommending (and in that advertising) any particular brand. I hope you understand?

Yea I understand ...
however it would be nice if someone could ref a clear coat (enamel type)
that has a very hard finish ....

anyone??? or perhaps a site(www) that has a hardness test / scale of
paints hardness toughness???

I hope one of the members here can react and give you that advise

Thanks for understanding!

still looking

It's been over 3 months now, still tacky?
Only 2 possibilities.
Either the paint is actually defective or the ABS plastic gave off some catalist when you sanded it.
You may have to start over again by trying to remove the sticky paint the best you can and sand again. Clean ABS with alcohal before painting.
Good luck. I like Armor coat myself.

I did clean with alcohol
oh well thanks all