haha thats funny

I feel sad for you in a good way ok? I'm just smiling now
Have no idea what type of paint the montana is but for sure the clear coat you put in there was a darn lacquer. Ask the guys from montana what type of paint is, i bet is a water based acrylic type of paint, then you put the clear that im 10000% sure it was a lacquer then the clear started eating the paint underneath big time after 10 to 20 minutes

. Looks like the montana paint is a rebadge of another brand hmm something like plutonium? cant remember.
Next time use this... use u-pol clear coat, that clear is polyurethane it should not affect the paint you are using at all.
Now u have to sand again and start over, my advice is to go to the car paint shop and get paint in there, get u-pol primer or any other can car primer then ask them for polyurethane paint and get the smaller can of thinner for that paint, the paint and the thinner need to match or you are asking for trouble again, and no mineral spirits or water wont work

. If you do not have a spray gun or a compressor, neither a hobby spraybrush thingy ask the guy to put the paint in cans for you and get at least 4 to play safe. Buy a good mask also because that paint stinks and is super toxic. Apply the primer... paint... let dry for 30 minutes... paint again... then done. Let it dry for at least 3 hours and sand if needed. Then apply the upol clearcoat twice and let it dry. If you need to sand do so. polish the paint. Done.
Paint is not just go ahead and do it, the main problem with all those canned products is that wont stand the usage of the bike and probably you will start getting chips and nicks in the paint while putting the parts back in the bike. The main issue is that the acrylic laquer takes centuries to cure, and we are talking about 6 months for that to happen. A polyurethane paint will take a while to get fully cured but at least you an use it almost next day w/o having problems. That the paint is hard and that you can touch it doesnt means that is cured.
Good luck again, probably will be faster and cheaper for you get a 100 bucks powder coating job. Or a friend that paint cars.
Good luck