Do you stop the turntable or let it spin while you run e record brush

On my Technics SL1200G, being direct drive I have no such problems.  You can bear down hard on the brush while TT is spinning and the speed never slows down. 

Are you kidding ? You can’t damage the motor using a brush! Even if you put heavyweight disc stabilizer and mat on top you can’t damage DD motor. Your brush in NOTHING for this direct drive motor. Low torque or high torque - you can’t stop the motor with brush if you know how to use it right.

I have two LUX PD-444, this is the brush I use for ages and I never stop the platter when I use the brush. If you don’t have this brush - buy it (the label can be different). It will cost you $6-15. The best brush ever made!

You don’t need a felt brush that looks like a brick with flat edges (I’ve seen some), those are for sleaning records when they are not on a turntable.

Soft carbon-fiber brush is what you need.

Just got back to listing music on vinyl from being strored away for over 2 decades and at least 1/2 of my records are from dj’ing environment (very dirty) and a lot of them requires washing or at least heavy brushing and the plater fights the bras hung a lot.
No such issues with belt drive (belt slippage) or high torque DD tables (ala sl1200, sp10,etc)
That’s the reason for this question.
I guess I should wash most of my records.

sukeun

I use the Brush in the Link.
It is the softest Brush I have come across that has a dedicated purpose for LP Cleaning.
It has been reserved for Brand New Vinyl and recently my Newly Cleaned Vinyl, that is slowly growing in numbers.
All my Vinyl Collection is being cleaned since the beginning of 2021, and this has been a purchase that has been good to incorporate into the post cleaning processes for vinyl care
.
The ASB -1 Dust collection is extremely good, and work effectively without the need to apply a force, the free weight laying on the LP will remove any surface contaminant in not much more than two revolutions of the LP.
I leave the Puck Weight off when cleaning as when on the LP, it shields the light source across the LP from a local placed lamp that is set to direct a light onto the LP Surface.
The use of the lamp really aids with showing off the surface contamination that settles on the LP in a very short space of time.
The Brush is also the only brush I have used that when thoroughly removing contaminant does not cause slippage of the LP on the Platter, as there is no need to apply a down force to the Brush.

I certainly don't see this brush as being responsible for labouring the TT's motor.

It does command a Price above the commonly seen prices, but the effectiveness of the clean, the not producing slippage and the other properties it is claimed to contain, that are more difficult to comment on, make it an item I am happy to own. 
It fits perfectly into the equipment purchases made to carry out a regime of Vinyl Care and ensure the Source Medium is off a high standard when in use.  
     
https://www.yukimu-officialsite.com/asb-1

@skchun 

I guess I should wash most of my records.

Absolutely. Not the highest end cleaner, but effective, I bought a new Record Doctor V. Makes a big difference. Also have a basic Spin-Clean, which is great for dirtier records for a first clean.

I use a brush before every play, use a light touch. But, yes, I have found if my record drags while using a brush, that is a good sign it needs cleaned.