Paint Gurus - SEM Sand Free

Has anyone used SEM Sand Free adhesion promoter to help with adhesion issues on a re-paint? I have an area that is very hard to get to to really sand/prep well but it will show when the job's done. Will this stuff work to soften/make sticky the previous paint and allow the new paint to adhere? Thanks

 

I have never used the SEM product but have used Bulldog adheasion promoter for many years with good results.

 

I would prefer the bulldog myself, sem has one called "adhesion promoter" that is really good.
the sand free is used wet-on-wet no flash off, I think that would mess with metallic flop and quite probably gloss on a single stage.

 

Thanks for the info. Anyone else?

 

I have used both bulldog and sem theu both work good...

 

no problems with either one, but I always seem to have bulldog on hand.