problem: 
 Slug Lifting and Cutting Clearance Corrections
 Cold-Welding
 Cutting-Edges Blunting
solution:
 wocafix the matrix
 wocafix outside of the punch
 wocafix faces of punch and matrix
| Defects: | Punching burrs, punching off - cuts rise up | 
| Coating: | All die apertures | 
| Refinishing: | none | 
| Result: | Punching burrs removed, off - cuts remain in die | 
| Service life: | Increased to 220% | 
| Defects: | Cold welding on bending jaws, cut - offs rise up | 
| Coating: | Bending jaws radii and die apertures | 
| Refinishing: | Light repolishing of bending jaws | 
| Result: | Clean bending parts, cold welding and rising up of cut - offs avoided | 
| Service life: | Increased to 280% | 
| Defects: | Cold welding and cracking of the material | 
| Coating: | Bending radii and embossing contours | 
| Refinishing: | Repolishing of radii and contours | 
| Result: | Material flows better, no more cracking and cold welding | 
| Service life: | Increased to 650% | 
| Problem: | Corrosion on drawing die, poor flow | 
| Coating: | Radius on drawing ring | 
| Refinishing: | Fine polishing of radius | 
| Result: | Corrosion eliminated, material flows better, cleaner surface | 
| Service life: | Increased to 530% | 
| Defects: | Sticking and cracking open of material | 
| Coating: | Die aperture | 
| Refinishing: | Light refiling with diamond file | 
| Result: | Even flow of material, less pressure, no alteration in size when cleaning | 
| Service life: | Increased to 750% | 
| Defects: | Corroded stamping radius, material sticking | 
| Coating: | Stamping radius and drawing edge | 
| Refinishing: | Fine lap coating | 
| Result: | Corrosion and sticking avoided, better flow of material | 
| Service life: | Increased to 600% | 
| Defects: | Abrasion of the edges and extrusion points | 
| Coating: | Extrusion channels and mold edges | 
| Refinishing: | Smooth edges with diamond file | 
| Result: | Good injection, edge strength | 
| Service life: | Increased to 250% | 
| Defects: | Erosion of injection channel and surface | 
| Coating: | Injection channel and surface | 
| Refinishing: | Light polishing | 
| Result: | Erosion avoided, as also spraying - on point | 
| Service life: | Increased to 300% | 
| Defects: | Wearing of edges and breaking of the die | 
| Coating: | head and aperture | 
| Refinishing: | none | 
| Result: | Better ejection, less wearing of the edges and consequently no breaking | 
| Service life: | Increased to 480% | 
| Defects: | Intense wearing leading to undersize | 
| Coating: | Plain grinding - bevel | 
| Refinishing: | lap in drilling or grind to size | 
| Result: | True - to - size again, abrasion - proof | 
| Service life: | Increased to 650% |