Not that it ever happens but what is your favorite way of hiding flaws, mistakes etc. My personal fave are tarps they hide a multiple of sins. BTWE I don't alwys use tarps to cover mistakes sometimes they are there on purpose.

If I make a mistake and realise it I fix it properly even at the cost of dismatleing the whole kit

My position is betweens yours and Cliff's on that. I usually prime my models because I extensively use scratchbuilt parts in a variety of materials so I need to have an homogeneous "ground" before applying paint. This helps me quite a lot in identifying problems and mistakes and, if I can find them, I do as Cliff does, otherwise I try to find a way to hide them, and they can be the most disparate...
Ciao

Hmmmm it kinda depends. If its fixable I definitely fix it. Then it depends on visibility, if its prominent I try to work it into either damage, weathering, personal gear over it, a figure over it.

With PhotoShop #:-)

I just couldn't help myself...

As for me, I rebuid them. If the part is hidden, I let it be.

In armour kits is more easy to hide an error, in aircrafts some error means that you have to fix it properly. This is because the tanks when in the battle field always have battle damage, and that help you to disimulate an error. In airplanes the only thing that you can do is weathering.
In my case if it is posible I use some trick to hide it, but if it is no posible, I fix it.

I just don't tell anyone about them.

But like Marty said... photo editors work wonders!

MUD !!! I have used mud as a cover for the occasional oops. I mix sifted soil with ground cover, a part Modge Podge and some burnt umber paint - MUD... An old stiff paint brush to smear it about and it can cover all sorts of sins..

Paint, a good paint job can hise anything (on a tank)

Army stuff (bags, guns, tarps)

Other than that I try not to make any, ohh wait I never make any. I am perfect!

~Chip :-)

Howdy godfather, or should I say Godfadda?

....mistakes? What mistakes?

Actually, it depends upon just precisely how much of a bloody 'anal-retentive' I'm being at that particular moment, or on that particular model. I'm the type of person (although generally I'm not 'A' type at all), where when I'm cleaning and prepping my parts for assembly, even if the part will be completely hidden I will still clean up the seams no matter what, because I"LL know they're there. Although, there are some instance's where I will plan in some 'blindness' to a project. A stone cold example is my recent M1070 Super HET Tank Hauler w/ M1000 trailer kit by Accurate Armour (of all people).
The kit is a VERY expensive model, but, as is (it seems) with all resin kits (especially this complex), there are flaws that already exist in the kit itself that 'by design' can only be ignored. Some of the 'flaws' on the HET kit are even shown plainly in the Tamiya Model Magazine build-up article of the kit!
But pardon me....I err, you simply requested method's to camoflage mistakes. Excuse my 'long-windedness'.
In that endeavor, all your choice's are 'add-ons'. Stowage, draped clothes, mud, 'damage', accessories, etc. As far as paint covering mistakes, my experience has been that painted over mistakes look precisely like................painted over mistakes.

A Farthing's worth.

Tread.

lot colour and glue