Softer and Mr Mark Setter are two products that you can use for decals. Softer will help decals adhere better to irregular surfaces. Apply the softener to the surface before applying the decal. After the softener has dried you can apply the decal. You can use the same products to apply decals to poorly made decals from Eastern Europe and uneven surfaces.
Mr. Mark Setter is a dual-product solution that can be used to apply decals or lettering. The use of softer NEO to bond decals to uneven surfaces and improve bonding is possible. Use several coats to avoid streaks or bubbles. You can apply a caution sticker to the damaged decal to prevent chipping. Gloss varnish protects the model’s paint job and provides a smooth surface to transfer decals.