Hi there, I've had to use dial dots on old seiko 5 watches because of broken dial feet which is common on some older ones. Generally speaking a screw driver gently prying will easily remove the dial without any difficulty or damage as they are only holding the weight of the dial in place, as watchweasol said you have to make sure that the dial is spot on before sticking, or you will have to remove and try again.When service time comes around just put new dial dots on again no problem. No need for shellac. Hope that's what you want to know
Hi yes it's close. When I did my first crystal, I used a 5 dollar set of diamond files with water and it worked well. Just keep checking because you can get carried away and also file edges as vertical as you can. Once you have got it down to size just use Hypo cement to glue the crystal in place and your done. You can do this with just about any watch once you get the hang of it.