There are some scratches that Menzerna SIP couldn't take care of even after 2 passes on an orange pad with decent pressure.
What is OHC? Meguiar #95/#105 seem to be very appreciated in the detailing world.
Did you try using a yellow pad instead ?, if your scratch is deep it is not going to go away with two little passes ! The orange pad is basically almost like the white polishing pad. M105 has a 20 sec working time, I heard bad things about it !
OHC is my go to compound, it never dries or dusts like conventional compounds. I have introduced this compound to two car dealers in Montreal and they threw out everything they were using before, since most of them are using a rotary which causes holograms and swirlies, OHC is easier to use and more forgiving for inexperienced rotary users.
OptimumTM Hyper Compound
An aggressive compound when there is a need for speed!
Optimum HyperTM Compound was designed for professional detailers and autobody shops to cut through wet sanding marks and deep scratches in one or two passes. Optimum HyperTM Compound offers all the advantages of Optimum line of polishes with infinite working time and zero dusting. However, it is more aggressive and can generate the desired results in a fraction of time.
The minor swirls or haziness left after using Optimum HyperTM Compound can easily be removed with the OptimumTM Compound or Polish.
Optimum HyperTM Compound has a longer working time than most compounds to prevent dry buffing. Although it is full of lubricants, it contains no silicone oils or wax, so it is completely body shop safe.
Optimum HyperTM Compound can be used at any speed on your polisher and with a wool or foam pad. When using a wool buffing pad, the compound will remove 1000 sand scratches and lighter at 1000-1400 RPM. Faster buffing speed is not needed with this product. When using a medium or heavy cut foam pad, the compound will remove 1500 sand scratches and lighter at 1000-1400 RPM. The compound works more or less aggressively depending on the pad you choose. Follow up with Optimum Polish to refine the paint surface before applying Optimum Wax. All Optimum products meet VOC regulations.