Hi,
I Have never tried marbelling that way before.
In colleges & on most courses here in the UK we are not taught Watermarbling. The method taught is with dots of acrylic paint, squiggled together with the dotting tool.
You can use as many dots as you wish though its a case of less is more with the squiggling, if you over do it the paint just blends in and you get a mess.
Heres how I do it....
Paint the nail with your choice of varnish,
Take 2 or 3 (but no more) colours of acrylic paint,
Randomly dot the paint over the painted nail,
Squiggle the dotting tool in the dots of paint, think figure of 8 or 'S' shapes, (with a light touch) sort of 'flick' the paint towards the next dot and then move on and do the same with the next colour dot.
Ive had some fabulous results with this, also some tacky mess. Its a case of keep practicing and not over-working the paint thats all ... have to say though ... Ive never had one client choose it from my board! :lol:
Whats your problem with opalescent blending? if you can explain what you think is going wrong, maybe someone can help.