I already tried to make some paintings multicolor swirl at my home. In the truth, already I made nine and two had been perfect.
The question number one is: the ink, in contact with the water, hardens and dries in 1 minute, forming a film.
Two: you need to dilute the ink and this cannot be very thick. The ink cannot be very transparent, to not disclose primer of the body of the guitar.
Three: you have to choose the best position to dive the body of the guitar and the best position to remove it, without making dirty or spotting the done work!
Before removing the body, the face of the water is necessary to clean all, removing all the ink. You need to have two pairs of hands to make this!
A pair to hold the guitar inside of the water, and another pair to clean the remaining ink in the face of the water. Everything this before removing the body of the water...
Four: you cannot choose the effects, the way of the ink. You cannot choose the directions of the swirls... You don't choose nothing. It left the water, thus will be.
Five: You need to use 500 liters of water and you need a great water tank, with 1,50 meters of diameter, with a meter of height, at the very least. All the ink that remains is wasted and turns garbage.
Six: the varnish. You have to use a thick coat, with some layers, without sandpapering the painting, covering all the imperfections.
ASAP, i will include photos of swirls that i made. But it was not far from easy to learn alone herein Brasil. I ruined a great portion of ink, hehehehe
Believes this or not, it is this.
My english is very bad, i know that...
But i hope that all of you can understand.
C Yah!