I've used humbrol and liked it, but recently bought the Tamiya white and find it dries way to quickly for me. Anything with more workable time and easier to clean up?

I find its needed in the front gap on certain 1/72 models behind the spare tracks.

Anyway, would love to get better at using glue for this also .... any tips on that would be appreciated on that. I've read I can use my Tamiya glues (brush applicators ) for this as well.

You can thin Tamiya putty with Tamiya glue, but it will dry even faster in small applications. The glue applicator caps are excellent for this. Have you tried Squadron Green or White putty-- it dries slower, but it's also "grainier", and in large applications it can form voids or bubbles, whereas Tamiya putty is smoother. My "go-to" putty is the standard red automotive Bondo, found at any good auto-parts store. It's smooth like Tamiya, yet it dries at a slower rate, is mixable with any of the common liquid styrene cements (but doesn't work well with the Testors "safety glues" in the black applicators which are citrus or citrine based glues). My absolute favorite putty is Porc-a-filler by Kit Industries. This is an acetone based porcelain putty that is super smooth, dries slowly, and is rock hard yet workable when dry. I also use Milliput epoxy putty that dries super slowly and cleans up with water on occasion. I know some modelers who swear by Alves water based putty too, but I've never used it so I can't vouch for it.
VR, Russ

Is this the Aves?

https://www.avesstudio.com/shop/apoxie-paste/

Sounds good.....

What Milliput, the 2 part epoxy ? Easier the clean up the better

Yes-- it's Aves Apoxie Sculpt. The Milliput is two part epoxy, once mixed, it can be formed in your fingers, stretched or rolled into a ball.
VR, Russ

I tried Vallejo putty for the first time to fill a very thin gap.
It can be wiped away easily and does not shrink. I used to use epoxy sculpt for gap filling but this is much better.


https://www.scalemodelshop.co.uk/20ml-plastic-putty-tube-vallejo-70-401.html

i use the Tamiya but i like a lot also the Deluxmaterials Perfect Putty,water based very easy to use and clean you need just water,for really tiny gaps Mr dissolved putty or MR surfacer 500

https://www.deluxematerials.co.uk/en/scale-plastics/87-perfect-plastic-putty-5060243901095.html

For small gaps Vallejo is great: apply, wipe the excess with your finger and ready. As it has no solvents it can be also removed after dried, if necessary.