To ensure a successful application of UltraClear epoxy, it is essential to apply three coats of oil-based polyurethane to seal the surface before applying the seal coat. This is because epoxy does not adhere well to other stains, and its surface may be porous and experience a detachment effect if it comes into contact with oil-based paint. Water-based paints are better and quick-drying, so you can apply the epoxy over them in about 24 hours. Oil-based paints take a long time to dry completely, so you must apply 3 coats of oil-based polyurethane to seal the surface before applying a seal coat of UltraClear epoxy.
If you pass directly on the oil-based paint and it is not completely dry, you run the risk that the epoxy will not stick to the surface and peel off months later. Yes, you can use ArtResin epoxy resin over the oil paint once it has completely dried. It adheres and seals completely on any dry oil paint. However, it is not recommended to mix oil and acrylic paints in your palette before applying them to the canvas.
If you want to paint first one and then the other, it's okay to paint oils on acrylics, but never paint acrylics on oils. Oil paint is usually more expensive than acrylic, so costs should be slightly higher to recoup the cost of materials. Clean the canvas with Turpenoid Natural solvent, which is citrus-based and non-flammable. Place the canvas and pour a generous amount of Purell hand sanitizer (Aloe free).
Let it rest and once it softens, wipe it with a damp cloth. Epoxy will work well on latex and acrylic paint but does not stick to oil based paint. Take an x-acto knife and scrape off the partially dried oil paint, slowly and carefully so as not to tear the fabric from the canvas. Acrylic resin (but not acrylic emulsion, which is the basis of acrylic paint) is a thermoplastic, which means that it is part of a group of plastics that can be repeatedly heated and handled, while polyester resin and epoxy are thermosetting plastics, which use heat or a catalyst to solidify into a solid. It is possible to use oil-based paint on epoxy, but it is not recommended. The two paints have different drying times, and the oil in the paint can cause the epoxy to yellow over time.
This requires water-based paints, as they usually dry quickly, so you can apply the epoxy over the paint after a couple of days if the paint has been sprayed. If you want to lay an epoxy floor on oil-based paint, you must first seal the oil-based paint with three layers of polyurethane finish before laying down the epoxy floor. Having a direct application of the oil-based paint on which it is not completely dry is risky due to the possibility that the epoxy will not adhere to the surface. It is usually not necessary to seal a paint before using epoxy resin for floors unless the old paint is oil-based. The epoxy floor adheres to water-based paints and acrylic paints but does not adhere to oil-based paints. If you previously used oil-based paint on the floor, make sure that it has dried for more than 72 hours before applying a coat of water-based paint. Unlike a water-based topcoat, make sure that any finish such as Java Gel Stain dries for more than 72 hours before applying a coat of water-based paint.