Who uses which filler?

[WorldClassAccident]

What finish filler are people using?

I fill the big dents with P38 because it is what I had in the garage but what gives a nice finish without costing millions?

Cheers

[Jaguartvr]

I use U-POL B Glass Fibre on fibreglass as I think it is less likely to crack. It is a lot harder to sand back, For any small areas that just need a thin skim I use the U-POL filler and U-POL dolphin glaze for a final finish and for pinholes.
I use all U0POL so I won't get any reactions and it seems to be used in the trade.

[Drummajor]

How about flexible filler?
Has anybody tried it?

[IanA]

The guy who painted my Z300s recommended Indasa Autofill for any filling, pre-primer that it may need.
Sounds like an easy-sand paste with glass and kevlar reinforcement. I have to say that the Isopon P40 with glass strands that I used to fill in the door mirror depressions is not the easiest to sand.

[clinkadink]

Originally Posted by Jaguartvr

I use U-POL B Glass Fibre on fibreglass

Same here. And P38 for body filler. Recently, I ran out, I needed some the same day so I bought some Big Boy from Toolstation. That's flexible, cheap and no issues so far.

[Lucky@LeMans]

Big Boy Flexi filler works well on most surfaces including GRP and other plastics such as bumpers. Also good on metals including aluminium. Mixes to a nice runny consistency so it goes on well and doesn't clog when sanded ( dry )

Bought my last tub via ebay for about £12 for 600ml.