Stafford bike show is next weekend I think, if I’m going I need to write a shopping list, flap discs, cut off discs, metal stock, cheap aerosol paint etc. Normally I forget, and when I’m actually there I go total air head and can’t think of a single thing I need.
I only live 4 miles from it, so I ought to make the effort.
Depends if you want to remove large amounts of weld or just polish up the work area, I go from 40 grit to 120 for final polish, If the bead is large and I stuffed up the weld due to some reason or other, then I would start with a grinding disk, however if the finish was important then remove the bulk and work up from there. I keep several grinders handy when welding, each with a different disc on hand and use which ever is appropriate and required, saves a lot of time by not swapping discs.
tyrolit are a great trade between quality and price , those cheap e bay brown ones dont even feel right going on the grinder , let alone when trying to buff with them , they just turn money to dust faster than even a land rover can
As others have already posted, grinding wheel for really bulbous stuff.
80 Grit flap disk for smoothing down. (personal pref)
Did try the Bosch X lock flap disks (they fit in normal grinder) was really disappointed with how quickly they wore down.
Have a look at how the flap disk is constructed, some have the pads close together, others quite widely spaced.