Looking for some advise. I made some foam rocks covered in grout, left to dry 3 days. They came out nice. Then I tried to seal with polycrylic water base matte finish from minwax. However after one thin coat it dried milky white (and yes i stirred well). After 24 hours and no change i sanded and applied water base polyurethane. The polyurethane seemed to dry clear, but they are still very cloudy from that first coat. Does anyone know what i did wrong? Also, if I paint the rock now with acrylic paint, could i just add more layers of polyurethane, or would the paint make the polyurethane not adhere correctly? Thanks for any help.
So now that you have sealed it you can use acrylic paints to form shadows and depth in what ever color you want. After that spray your polycrylic on again, this will cover the cloudy look. That is what I would do.
Thanks. I wanted to make sure acrylic paint would stick and the polyurethane would stick to the paint and still seal the rock. Does it still matter if its spray on, now that the grout is sealed? I wanted to stay with the water based polyurethane if possible.
Thanks. I wanted to make sure acrylic paint would stick and the polyurethane would stick to the paint and still seal the rock. Does it still matter if its spray on, now that the grout is sealed? I wanted to stay with the water based polyurethane if possible.
I would spray on the first coat to be sure in doesn't blend with the paint.
To spray the polycrylic on, you can get a spray bottle and, thin it down with a little water and, spray it in thin coats. 3 thin coats should get you where you want to be.
Thanks. I wanted to make sure acrylic paint would stick and the polyurethane would stick to the paint and still seal the rock. Does it still matter if its spray on, now that the grout is sealed? I wanted to stay with the water based polyurethane if possible.
I would spray on the first coat to be sure in doesn't blend with the paint.
To spray the polycrylic on, you can get a spray bottle and, thin it down with a little water and, spray it in thin coats. 3 thin coats should get you where you want to be.
I've always sprayed on my finishes, or at least completely painted a project (also a means of sealing the grout) before applying a clear sealer so I've never encountered this. Good call Gormagon.