Jazakallah for your mesg and i dont think any of ur question is nonsense 
Omar bhai respond u perfectly and nothing much left for me to add but since u also wish to hear me so here is my responce
1) Hyper Dressing is water based dressing to all plastics, vinyl and rubbers of car either in enginebay, interior , exterior etc.
extreme weathers , detergents washes make the plastics and rubber very dry , dull , whitsh and ultimately cracks comes in them
so same like paint they also require proper nourishing to keep them lively , Hyper dressing is water based concentrated dressing and u have to add water in it as per your desired shine, due to concentrate its quite price effective and being water based its quite safe for frequent use. Hyper dressing dont have cleaners so u have to use apc or other puropose build cleaners to clean subjected surfaces before applying Hyper dressing. application easy, either apply by foam applicator pad to desired surface or spray directly in enginebay and leave it to dry naturally
Quik interior detailer is petrolium based interior detailer with cleaning agents so its all in one product , by name its quite quick just spray and wipe and enjoy nice medium shine surface with re-freshing smell
can use on rubber, vinyl, plastic, metal , being petrolium based its life comparatively longer.
Hyper dressing comes best on cleaned , neglected surfaces its like a olive oil massage on dry neglected hairs haha
2) all metal polish , yes by name its al metal polish and yes u can use it in enginebay metal parts, u can also use on exterior logos however becarefull thoes exterior logos and emblems are plastic with chrome finish so dont rub harshly
3)APC
its all purpose cleaner and its having multi use, its must to have with everyone , u can use it in car interior cleaning as well as exterior or enginebay , comes in concentrate and have to dilute in water as per required outcomes , ( well for enginebay dedicated super degreaser do magic in very short time ) Apc is must for any car lover infact its app pourpose cleaner so u can even also use it for cleaning ur household things or even in hospitals , schools its use in floor cleaning 
4) scratch x
its a kind of mild compound with micro abrassives to remove scratches , perfect for specific problematic area or even can apply on whole car to remove oxidation, light stains, secratches and surface contaminants. its breakinn time is less so this product is ideal for hands use or orbital or da polisher, this product not recommend for rotary polisher. in case by hands application use damp foam or folded microfiber cloth , apply on pad and rub gently rub the effective surface with firm hands but hand pressure should be medium , in short words more rubs with medium pressure than less rubs with hard pressure
5)Ultimate polish
again its based on micro abbrasives polishing glaze and its breakin time is less so its recommaned for use by hands or orbital or da polisher, no rotary polisher for this polish.
6) we imported meguiars professional range products in gallon packings for professional detailing houses but for PW brothers we specially taking pain to fill in 1.5 liter bottles @rs1150 for d/greaser and rs1950 for H/Dressing
More questions welcome 